./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:30:36,795 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:30:36,835 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:30:36,838 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:30:36,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:30:36,856 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:30:36,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:30:36,857 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:30:36,857 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:30:36,857 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:30:36,857 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:30:36,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:30:36,858 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:30:36,858 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:30:36,858 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:30:36,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:30:36,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:30:36,859 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:30:36,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:30:36,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:30:36,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:30:36,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:30:36,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:30:36,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:30:36,861 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:30:36,861 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:30:36,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:30:36,861 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:30:36,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:30:36,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:30:36,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:30:36,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:30:36,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:30:36,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:30:36,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:30:36,863 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:30:36,863 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:30:36,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:30:36,864 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:30:36,864 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:30:36,864 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:30:36,865 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:30:36,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:30:36,865 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:30:37,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:30:37,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:30:37,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:30:37,046 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:30:37,047 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:30:37,048 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 17:30:37,233 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:30:37,235 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:30:37,235 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 17:30:38,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:30:38,404 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:30:38,406 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 17:30:38,416 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f10f23e1/2eaec788f07940a3a81275d28e5f3e78/FLAGf2cc700cf [2024-06-21 17:30:38,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f10f23e1/2eaec788f07940a3a81275d28e5f3e78 [2024-06-21 17:30:38,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:30:38,427 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:30:38,427 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:30:38,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:30:38,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:30:38,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:30:37" (1/2) ... [2024-06-21 17:30:38,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d7a760 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:30:38, skipping insertion in model container [2024-06-21 17:30:38,432 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:30:37" (1/2) ... [2024-06-21 17:30:38,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43c78161 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:30:38, skipping insertion in model container [2024-06-21 17:30:38,434 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:30:38" (2/2) ... [2024-06-21 17:30:38,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d7a760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:38, skipping insertion in model container [2024-06-21 17:30:38,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:30:38" (2/2) ... [2024-06-21 17:30:38,434 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:30:38,503 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:30:38,505 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-21 17:30:38,505 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-21 17:30:38,505 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-21 17:30:38,506 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:30:38,506 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-21 17:30:38,542 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:30:38,872 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:30:38,880 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:30:38,979 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:30:39,023 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:30:39,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39 WrapperNode [2024-06-21 17:30:39,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:30:39,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:30:39,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:30:39,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:30:39,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,063 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-21 17:30:39,064 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:30:39,064 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:30:39,064 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:30:39,065 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:30:39,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,075 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,090 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:30:39,090 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,090 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,110 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,116 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:30:39,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:30:39,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:30:39,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:30:39,117 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (1/1) ... [2024-06-21 17:30:39,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:30:39,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:30:39,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:30:39,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:30:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:30:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:30:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:30:39,172 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:30:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:30:39,172 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:30:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:30:39,172 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:30:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:30:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:30:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:30:39,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:30:39,174 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:30:39,262 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:30:39,264 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:30:39,593 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:30:39,593 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:30:39,685 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:30:39,685 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:30:39,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:30:39 BoogieIcfgContainer [2024-06-21 17:30:39,686 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:30:39,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:30:39,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:30:39,689 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:30:39,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:30:37" (1/4) ... [2024-06-21 17:30:39,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144b5356 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:30:39, skipping insertion in model container [2024-06-21 17:30:39,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:30:38" (2/4) ... [2024-06-21 17:30:39,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144b5356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:30:39, skipping insertion in model container [2024-06-21 17:30:39,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:30:39" (3/4) ... [2024-06-21 17:30:39,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144b5356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:30:39, skipping insertion in model container [2024-06-21 17:30:39,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:30:39" (4/4) ... [2024-06-21 17:30:39,692 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-21 17:30:39,703 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:30:39,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:30:39,704 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:30:39,731 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:30:39,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:30:39,795 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 17:30:39,796 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:30:39,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:30:39,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:30:39,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 17:30:39,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:30:39,817 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@16ce38ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:30:39,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:30:39,821 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:30:39,821 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:30:39,821 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:30:39,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:39,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:30:39,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:39,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:39,826 INFO L85 PathProgramCache]: Analyzing trace with hash 362810851, now seen corresponding path program 1 times [2024-06-21 17:30:39,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:39,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627424342] [2024-06-21 17:30:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:40,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:40,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627424342] [2024-06-21 17:30:40,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627424342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:40,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:40,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:30:40,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137925134] [2024-06-21 17:30:40,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:40,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:30:40,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:30:40,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:30:40,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-21 17:30:40,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:40,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:40,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-21 17:30:40,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:41,017 INFO L124 PetriNetUnfolderBase]: 891/1368 cut-off events. [2024-06-21 17:30:41,017 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-21 17:30:41,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2789 conditions, 1368 events. 891/1368 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6471 event pairs, 520 based on Foata normal form. 2/1340 useless extension candidates. Maximal degree in co-relation 2777. Up to 1335 conditions per place. [2024-06-21 17:30:41,029 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 17:30:41,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 169 flow [2024-06-21 17:30:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:30:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:30:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-21 17:30:41,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 17:30:41,040 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 77 transitions. [2024-06-21 17:30:41,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 169 flow [2024-06-21 17:30:41,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:30:41,044 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 17:30:41,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 17:30:41,047 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 17:30:41,048 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 17:30:41,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:41,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:41,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:41,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:30:41,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:41,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash 746924961, now seen corresponding path program 1 times [2024-06-21 17:30:41,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:41,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828627035] [2024-06-21 17:30:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:41,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:42,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:42,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828627035] [2024-06-21 17:30:42,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828627035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:42,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:42,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:30:42,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827334304] [2024-06-21 17:30:42,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:42,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:30:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:30:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:30:42,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 17:30:42,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:42,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:42,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 17:30:42,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:42,488 INFO L124 PetriNetUnfolderBase]: 1131/1721 cut-off events. [2024-06-21 17:30:42,488 INFO L125 PetriNetUnfolderBase]: For 341/355 co-relation queries the response was YES. [2024-06-21 17:30:42,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3989 conditions, 1721 events. 1131/1721 cut-off events. For 341/355 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7893 event pairs, 589 based on Foata normal form. 13/1728 useless extension candidates. Maximal degree in co-relation 3977. Up to 1639 conditions per place. [2024-06-21 17:30:42,495 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 37 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-21 17:30:42,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 222 flow [2024-06-21 17:30:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:30:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:30:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 17:30:42,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 17:30:42,497 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 94 transitions. [2024-06-21 17:30:42,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 222 flow [2024-06-21 17:30:42,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:30:42,499 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-21 17:30:42,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-21 17:30:42,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-21 17:30:42,500 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-21 17:30:42,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:42,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:42,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:42,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:30:42,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:42,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:42,501 INFO L85 PathProgramCache]: Analyzing trace with hash 934192984, now seen corresponding path program 1 times [2024-06-21 17:30:42,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:42,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492703067] [2024-06-21 17:30:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:42,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:43,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:43,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492703067] [2024-06-21 17:30:43,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492703067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:43,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:43,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:30:43,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403283324] [2024-06-21 17:30:43,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:43,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:30:43,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:43,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:30:43,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:30:43,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 17:30:43,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:43,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:43,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 17:30:43,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:43,328 INFO L124 PetriNetUnfolderBase]: 888/1371 cut-off events. [2024-06-21 17:30:43,328 INFO L125 PetriNetUnfolderBase]: For 720/723 co-relation queries the response was YES. [2024-06-21 17:30:43,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 1371 events. 888/1371 cut-off events. For 720/723 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6384 event pairs, 408 based on Foata normal form. 6/1374 useless extension candidates. Maximal degree in co-relation 3460. Up to 1326 conditions per place. [2024-06-21 17:30:43,334 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 39 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-21 17:30:43,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 271 flow [2024-06-21 17:30:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:30:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:30:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-21 17:30:43,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-21 17:30:43,339 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 5 states and 99 transitions. [2024-06-21 17:30:43,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 271 flow [2024-06-21 17:30:43,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 254 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:30:43,343 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 170 flow [2024-06-21 17:30:43,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-06-21 17:30:43,344 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2024-06-21 17:30:43,344 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 170 flow [2024-06-21 17:30:43,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:43,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:43,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:30:43,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:43,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1104787214, now seen corresponding path program 1 times [2024-06-21 17:30:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:43,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645195678] [2024-06-21 17:30:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:43,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:43,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645195678] [2024-06-21 17:30:43,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645195678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:43,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:43,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:30:43,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051500947] [2024-06-21 17:30:43,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:43,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:30:43,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:43,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:30:43,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:30:44,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:30:44,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:44,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:44,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:30:44,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:44,303 INFO L124 PetriNetUnfolderBase]: 1047/1601 cut-off events. [2024-06-21 17:30:44,303 INFO L125 PetriNetUnfolderBase]: For 1527/1527 co-relation queries the response was YES. [2024-06-21 17:30:44,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4594 conditions, 1601 events. 1047/1601 cut-off events. For 1527/1527 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7559 event pairs, 479 based on Foata normal form. 4/1603 useless extension candidates. Maximal degree in co-relation 4576. Up to 1534 conditions per place. [2024-06-21 17:30:44,311 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-21 17:30:44,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 379 flow [2024-06-21 17:30:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:30:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:30:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:30:44,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-21 17:30:44,313 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 170 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:30:44,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 379 flow [2024-06-21 17:30:44,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:30:44,318 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 242 flow [2024-06-21 17:30:44,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-21 17:30:44,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-21 17:30:44,319 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 242 flow [2024-06-21 17:30:44,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:44,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:44,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:44,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:30:44,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:44,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:44,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1136444429, now seen corresponding path program 1 times [2024-06-21 17:30:44,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:44,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354690973] [2024-06-21 17:30:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:44,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:45,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:45,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354690973] [2024-06-21 17:30:45,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354690973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:45,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:45,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:30:45,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496250779] [2024-06-21 17:30:45,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:45,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:30:45,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:30:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:30:45,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:30:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 242 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:30:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:45,456 INFO L124 PetriNetUnfolderBase]: 1053/1610 cut-off events. [2024-06-21 17:30:45,456 INFO L125 PetriNetUnfolderBase]: For 2521/2521 co-relation queries the response was YES. [2024-06-21 17:30:45,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5102 conditions, 1610 events. 1053/1610 cut-off events. For 2521/2521 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7678 event pairs, 461 based on Foata normal form. 4/1612 useless extension candidates. Maximal degree in co-relation 5080. Up to 1525 conditions per place. [2024-06-21 17:30:45,464 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 55 selfloop transitions, 15 changer transitions 0/75 dead transitions. [2024-06-21 17:30:45,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 75 transitions, 456 flow [2024-06-21 17:30:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:30:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:30:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:30:45,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 17:30:45,466 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 242 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:30:45,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 75 transitions, 456 flow [2024-06-21 17:30:45,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 450 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 17:30:45,469 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 301 flow [2024-06-21 17:30:45,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=301, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-21 17:30:45,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-21 17:30:45,470 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 301 flow [2024-06-21 17:30:45,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:45,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:45,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:45,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:30:45,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:45,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1021043945, now seen corresponding path program 1 times [2024-06-21 17:30:45,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:45,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633225620] [2024-06-21 17:30:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:45,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:46,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:46,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633225620] [2024-06-21 17:30:46,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633225620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:46,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:46,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:30:46,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634200903] [2024-06-21 17:30:46,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:30:46,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:30:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:30:46,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:30:46,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:46,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:46,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:30:46,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:46,535 INFO L124 PetriNetUnfolderBase]: 1276/1945 cut-off events. [2024-06-21 17:30:46,535 INFO L125 PetriNetUnfolderBase]: For 4885/4920 co-relation queries the response was YES. [2024-06-21 17:30:46,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 1945 events. 1276/1945 cut-off events. For 4885/4920 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9213 event pairs, 452 based on Foata normal form. 15/1910 useless extension candidates. Maximal degree in co-relation 6746. Up to 1793 conditions per place. [2024-06-21 17:30:46,547 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-21 17:30:46,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 485 flow [2024-06-21 17:30:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:30:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:30:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-21 17:30:46,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-21 17:30:46,548 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 301 flow. Second operand 5 states and 98 transitions. [2024-06-21 17:30:46,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 485 flow [2024-06-21 17:30:46,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 450 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:30:46,553 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 341 flow [2024-06-21 17:30:46,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-21 17:30:46,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-21 17:30:46,555 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 341 flow [2024-06-21 17:30:46,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:46,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:46,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:46,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:30:46,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:46,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash 870040347, now seen corresponding path program 1 times [2024-06-21 17:30:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:46,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2649983] [2024-06-21 17:30:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:47,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2649983] [2024-06-21 17:30:47,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2649983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:47,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:47,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:47,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051893913] [2024-06-21 17:30:47,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:47,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:47,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:47,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:30:47,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 341 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:47,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:47,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:30:47,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:47,941 INFO L124 PetriNetUnfolderBase]: 1112/1712 cut-off events. [2024-06-21 17:30:47,941 INFO L125 PetriNetUnfolderBase]: For 5598/5598 co-relation queries the response was YES. [2024-06-21 17:30:47,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6378 conditions, 1712 events. 1112/1712 cut-off events. For 5598/5598 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8351 event pairs, 435 based on Foata normal form. 24/1734 useless extension candidates. Maximal degree in co-relation 6352. Up to 1489 conditions per place. [2024-06-21 17:30:47,950 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 67 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-21 17:30:47,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 615 flow [2024-06-21 17:30:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:30:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:30:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:30:47,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:30:47,952 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 341 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:30:47,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 615 flow [2024-06-21 17:30:47,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 574 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:30:47,957 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 361 flow [2024-06-21 17:30:47,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-21 17:30:47,958 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 17:30:47,958 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 361 flow [2024-06-21 17:30:47,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:47,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:47,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:47,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:30:47,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:47,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:47,959 INFO L85 PathProgramCache]: Analyzing trace with hash 994368211, now seen corresponding path program 1 times [2024-06-21 17:30:47,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:47,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152856305] [2024-06-21 17:30:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:47,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:48,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:48,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152856305] [2024-06-21 17:30:48,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152856305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:48,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:48,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:48,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203474435] [2024-06-21 17:30:48,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:48,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:48,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:48,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:48,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:30:48,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 361 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:48,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:48,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:30:48,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:49,214 INFO L124 PetriNetUnfolderBase]: 1372/2089 cut-off events. [2024-06-21 17:30:49,215 INFO L125 PetriNetUnfolderBase]: For 5738/5742 co-relation queries the response was YES. [2024-06-21 17:30:49,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7520 conditions, 2089 events. 1372/2089 cut-off events. For 5738/5742 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9909 event pairs, 477 based on Foata normal form. 3/2090 useless extension candidates. Maximal degree in co-relation 7493. Up to 1948 conditions per place. [2024-06-21 17:30:49,235 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-21 17:30:49,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 655 flow [2024-06-21 17:30:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:30:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:30:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 17:30:49,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 17:30:49,237 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 361 flow. Second operand 6 states and 112 transitions. [2024-06-21 17:30:49,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 655 flow [2024-06-21 17:30:49,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 622 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:30:49,244 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 472 flow [2024-06-21 17:30:49,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-21 17:30:49,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 17:30:49,246 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 472 flow [2024-06-21 17:30:49,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:49,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:49,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:49,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:30:49,247 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:49,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash -773997575, now seen corresponding path program 1 times [2024-06-21 17:30:49,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:49,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548158844] [2024-06-21 17:30:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:49,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:49,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548158844] [2024-06-21 17:30:49,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548158844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:49,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:49,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:30:49,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026746372] [2024-06-21 17:30:49,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:49,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:30:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:30:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:30:49,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:30:49,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 472 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:49,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:49,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:30:49,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:50,259 INFO L124 PetriNetUnfolderBase]: 1366/2087 cut-off events. [2024-06-21 17:30:50,259 INFO L125 PetriNetUnfolderBase]: For 7246/7246 co-relation queries the response was YES. [2024-06-21 17:30:50,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7982 conditions, 2087 events. 1366/2087 cut-off events. For 7246/7246 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9941 event pairs, 469 based on Foata normal form. 2/2088 useless extension candidates. Maximal degree in co-relation 7952. Up to 2048 conditions per place. [2024-06-21 17:30:50,269 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 72 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2024-06-21 17:30:50,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 712 flow [2024-06-21 17:30:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:30:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:30:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 17:30:50,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-21 17:30:50,270 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 472 flow. Second operand 5 states and 88 transitions. [2024-06-21 17:30:50,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 712 flow [2024-06-21 17:30:50,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 692 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 17:30:50,277 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 541 flow [2024-06-21 17:30:50,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=541, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-21 17:30:50,277 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-21 17:30:50,278 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 541 flow [2024-06-21 17:30:50,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:50,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:50,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:50,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:30:50,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:50,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:50,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2135018824, now seen corresponding path program 1 times [2024-06-21 17:30:50,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:50,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18909267] [2024-06-21 17:30:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:50,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:51,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:51,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18909267] [2024-06-21 17:30:51,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18909267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:51,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:51,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867736054] [2024-06-21 17:30:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:51,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:51,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:51,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:51,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:30:51,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 541 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:51,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:51,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:30:51,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:51,553 INFO L124 PetriNetUnfolderBase]: 1323/2044 cut-off events. [2024-06-21 17:30:51,553 INFO L125 PetriNetUnfolderBase]: For 7494/7526 co-relation queries the response was YES. [2024-06-21 17:30:51,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7882 conditions, 2044 events. 1323/2044 cut-off events. For 7494/7526 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9979 event pairs, 303 based on Foata normal form. 11/2004 useless extension candidates. Maximal degree in co-relation 7848. Up to 1864 conditions per place. [2024-06-21 17:30:51,564 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 64 selfloop transitions, 17 changer transitions 0/94 dead transitions. [2024-06-21 17:30:51,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 757 flow [2024-06-21 17:30:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:30:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:30:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:30:51,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-21 17:30:51,565 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 541 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:30:51,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 757 flow [2024-06-21 17:30:51,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 751 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 17:30:51,572 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 592 flow [2024-06-21 17:30:51,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-21 17:30:51,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-21 17:30:51,574 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 592 flow [2024-06-21 17:30:51,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:51,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:51,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:51,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:30:51,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:51,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:51,575 INFO L85 PathProgramCache]: Analyzing trace with hash 940248960, now seen corresponding path program 2 times [2024-06-21 17:30:51,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:51,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044169444] [2024-06-21 17:30:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:51,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:52,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:52,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044169444] [2024-06-21 17:30:52,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044169444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:52,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:52,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:52,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496523951] [2024-06-21 17:30:52,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:52,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:52,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:52,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:52,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:30:52,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 592 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:52,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:52,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:30:52,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:52,892 INFO L124 PetriNetUnfolderBase]: 1306/2016 cut-off events. [2024-06-21 17:30:52,892 INFO L125 PetriNetUnfolderBase]: For 9060/9089 co-relation queries the response was YES. [2024-06-21 17:30:52,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8151 conditions, 2016 events. 1306/2016 cut-off events. For 9060/9089 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9854 event pairs, 399 based on Foata normal form. 9/1980 useless extension candidates. Maximal degree in co-relation 8114. Up to 1822 conditions per place. [2024-06-21 17:30:52,903 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 59 selfloop transitions, 25 changer transitions 0/97 dead transitions. [2024-06-21 17:30:52,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 97 transitions, 828 flow [2024-06-21 17:30:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:30:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:30:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 17:30:52,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 17:30:52,905 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 592 flow. Second operand 6 states and 115 transitions. [2024-06-21 17:30:52,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 97 transitions, 828 flow [2024-06-21 17:30:52,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 789 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:30:52,912 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 633 flow [2024-06-21 17:30:52,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=633, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-21 17:30:52,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-21 17:30:52,916 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 633 flow [2024-06-21 17:30:52,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:52,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:52,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:52,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:30:52,917 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:52,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash -32009000, now seen corresponding path program 1 times [2024-06-21 17:30:52,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:52,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459518828] [2024-06-21 17:30:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:52,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:53,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:53,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459518828] [2024-06-21 17:30:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459518828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:53,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:53,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:53,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575714136] [2024-06-21 17:30:53,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:53,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:53,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:53,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:53,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:54,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:30:54,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:54,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:54,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:30:54,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:54,392 INFO L124 PetriNetUnfolderBase]: 1389/2122 cut-off events. [2024-06-21 17:30:54,392 INFO L125 PetriNetUnfolderBase]: For 9818/9822 co-relation queries the response was YES. [2024-06-21 17:30:54,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8806 conditions, 2122 events. 1389/2122 cut-off events. For 9818/9822 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10093 event pairs, 422 based on Foata normal form. 3/2123 useless extension candidates. Maximal degree in co-relation 8768. Up to 1935 conditions per place. [2024-06-21 17:30:54,402 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 76 selfloop transitions, 27 changer transitions 0/107 dead transitions. [2024-06-21 17:30:54,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 942 flow [2024-06-21 17:30:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:30:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:30:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:30:54,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:30:54,404 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 633 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:30:54,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 942 flow [2024-06-21 17:30:54,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 107 transitions, 886 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:30:54,412 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 672 flow [2024-06-21 17:30:54,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=672, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2024-06-21 17:30:54,413 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-21 17:30:54,413 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 672 flow [2024-06-21 17:30:54,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:54,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:54,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:54,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:30:54,413 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:54,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash -776007516, now seen corresponding path program 2 times [2024-06-21 17:30:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:54,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678766157] [2024-06-21 17:30:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:54,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:55,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:55,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678766157] [2024-06-21 17:30:55,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678766157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:55,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:55,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235000443] [2024-06-21 17:30:55,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:55,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:55,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:55,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:30:55,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 672 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:55,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:55,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:30:55,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:55,880 INFO L124 PetriNetUnfolderBase]: 1395/2139 cut-off events. [2024-06-21 17:30:55,880 INFO L125 PetriNetUnfolderBase]: For 11684/11690 co-relation queries the response was YES. [2024-06-21 17:30:55,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9350 conditions, 2139 events. 1395/2139 cut-off events. For 11684/11690 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10310 event pairs, 415 based on Foata normal form. 8/2146 useless extension candidates. Maximal degree in co-relation 9311. Up to 1968 conditions per place. [2024-06-21 17:30:55,891 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 94 selfloop transitions, 23 changer transitions 0/121 dead transitions. [2024-06-21 17:30:55,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 1070 flow [2024-06-21 17:30:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:30:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:30:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:30:55,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 17:30:55,893 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 672 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:30:55,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 1070 flow [2024-06-21 17:30:55,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 1010 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:30:55,906 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 750 flow [2024-06-21 17:30:55,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=750, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2024-06-21 17:30:55,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-21 17:30:55,907 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 750 flow [2024-06-21 17:30:55,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:55,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:55,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:55,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:30:55,908 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:55,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash 758654324, now seen corresponding path program 1 times [2024-06-21 17:30:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:55,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173413124] [2024-06-21 17:30:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:55,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:56,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:56,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173413124] [2024-06-21 17:30:56,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173413124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:56,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:56,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808817477] [2024-06-21 17:30:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:56,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:56,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:56,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:30:56,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 750 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:56,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:56,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:30:56,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:57,287 INFO L124 PetriNetUnfolderBase]: 1412/2163 cut-off events. [2024-06-21 17:30:57,287 INFO L125 PetriNetUnfolderBase]: For 14341/14345 co-relation queries the response was YES. [2024-06-21 17:30:57,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9958 conditions, 2163 events. 1412/2163 cut-off events. For 14341/14345 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10359 event pairs, 266 based on Foata normal form. 5/2166 useless extension candidates. Maximal degree in co-relation 9917. Up to 2023 conditions per place. [2024-06-21 17:30:57,298 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2024-06-21 17:30:57,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1087 flow [2024-06-21 17:30:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:30:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:30:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:30:57,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:30:57,300 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 750 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:30:57,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1087 flow [2024-06-21 17:30:57,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 1019 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:30:57,312 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 781 flow [2024-06-21 17:30:57,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=781, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-21 17:30:57,313 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-21 17:30:57,313 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 781 flow [2024-06-21 17:30:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:57,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:57,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:57,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:30:57,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:57,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:57,314 INFO L85 PathProgramCache]: Analyzing trace with hash -992431406, now seen corresponding path program 2 times [2024-06-21 17:30:57,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:57,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821145410] [2024-06-21 17:30:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:57,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:58,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:58,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821145410] [2024-06-21 17:30:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821145410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96306052] [2024-06-21 17:30:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:58,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:58,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:58,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:58,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:30:58,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 781 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:58,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:58,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:30:58,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:58,809 INFO L124 PetriNetUnfolderBase]: 1429/2190 cut-off events. [2024-06-21 17:30:58,809 INFO L125 PetriNetUnfolderBase]: For 16237/16241 co-relation queries the response was YES. [2024-06-21 17:30:58,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10293 conditions, 2190 events. 1429/2190 cut-off events. For 16237/16241 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10535 event pairs, 376 based on Foata normal form. 5/2193 useless extension candidates. Maximal degree in co-relation 10249. Up to 1942 conditions per place. [2024-06-21 17:30:58,820 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 96 selfloop transitions, 27 changer transitions 0/127 dead transitions. [2024-06-21 17:30:58,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 127 transitions, 1198 flow [2024-06-21 17:30:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:30:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:30:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:30:58,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:30:58,822 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 781 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:30:58,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 127 transitions, 1198 flow [2024-06-21 17:30:58,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1151 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 17:30:58,838 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 862 flow [2024-06-21 17:30:58,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=862, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-06-21 17:30:58,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 17:30:58,839 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 862 flow [2024-06-21 17:30:58,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:58,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:58,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:30:58,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:30:58,840 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:58,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash -917048238, now seen corresponding path program 3 times [2024-06-21 17:30:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:58,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705082336] [2024-06-21 17:30:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:58,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:59,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705082336] [2024-06-21 17:30:59,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705082336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:59,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:59,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:59,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790526622] [2024-06-21 17:30:59,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:59,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:59,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:59,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:30:59,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:59,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:59,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:30:59,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:00,242 INFO L124 PetriNetUnfolderBase]: 1421/2178 cut-off events. [2024-06-21 17:31:00,243 INFO L125 PetriNetUnfolderBase]: For 18494/18498 co-relation queries the response was YES. [2024-06-21 17:31:00,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10617 conditions, 2178 events. 1421/2178 cut-off events. For 18494/18498 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10488 event pairs, 381 based on Foata normal form. 5/2181 useless extension candidates. Maximal degree in co-relation 10570. Up to 1982 conditions per place. [2024-06-21 17:31:00,256 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 96 selfloop transitions, 26 changer transitions 0/126 dead transitions. [2024-06-21 17:31:00,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 1196 flow [2024-06-21 17:31:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:31:00,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:31:00,258 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 862 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:31:00,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 1196 flow [2024-06-21 17:31:00,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 126 transitions, 1110 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:00,285 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 857 flow [2024-06-21 17:31:00,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=857, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2024-06-21 17:31:00,286 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 17:31:00,286 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 857 flow [2024-06-21 17:31:00,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:00,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:00,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:00,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:31:00,287 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:00,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash -992277584, now seen corresponding path program 1 times [2024-06-21 17:31:00,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:00,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239968111] [2024-06-21 17:31:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:00,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:01,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:01,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239968111] [2024-06-21 17:31:01,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239968111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:01,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:01,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:31:01,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321495073] [2024-06-21 17:31:01,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:01,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:31:01,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:31:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:31:01,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:01,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 857 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:01,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:01,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:01,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:02,027 INFO L124 PetriNetUnfolderBase]: 1479/2286 cut-off events. [2024-06-21 17:31:02,027 INFO L125 PetriNetUnfolderBase]: For 21261/21265 co-relation queries the response was YES. [2024-06-21 17:31:02,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11108 conditions, 2286 events. 1479/2286 cut-off events. For 21261/21265 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11157 event pairs, 342 based on Foata normal form. 17/2301 useless extension candidates. Maximal degree in co-relation 11060. Up to 1784 conditions per place. [2024-06-21 17:31:02,039 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 97 selfloop transitions, 35 changer transitions 0/136 dead transitions. [2024-06-21 17:31:02,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1250 flow [2024-06-21 17:31:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 17:31:02,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 17:31:02,042 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 857 flow. Second operand 8 states and 151 transitions. [2024-06-21 17:31:02,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1250 flow [2024-06-21 17:31:02,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 136 transitions, 1204 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:02,062 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 913 flow [2024-06-21 17:31:02,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=913, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2024-06-21 17:31:02,063 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 17:31:02,063 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 913 flow [2024-06-21 17:31:02,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:02,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:02,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:02,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:31:02,063 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:02,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1713579636, now seen corresponding path program 2 times [2024-06-21 17:31:02,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:02,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798785283] [2024-06-21 17:31:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:02,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:03,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:03,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798785283] [2024-06-21 17:31:03,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798785283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:03,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:03,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:31:03,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628860864] [2024-06-21 17:31:03,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:03,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:31:03,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:03,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:31:03,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:31:03,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:03,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 913 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:03,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:03,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:03,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:03,773 INFO L124 PetriNetUnfolderBase]: 1581/2463 cut-off events. [2024-06-21 17:31:03,773 INFO L125 PetriNetUnfolderBase]: For 25087/25093 co-relation queries the response was YES. [2024-06-21 17:31:03,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12294 conditions, 2463 events. 1581/2463 cut-off events. For 25087/25093 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12399 event pairs, 376 based on Foata normal form. 18/2480 useless extension candidates. Maximal degree in co-relation 12245. Up to 1914 conditions per place. [2024-06-21 17:31:03,786 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 26 changer transitions 0/148 dead transitions. [2024-06-21 17:31:03,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 148 transitions, 1445 flow [2024-06-21 17:31:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:31:03,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-21 17:31:03,788 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 913 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:31:03,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 148 transitions, 1445 flow [2024-06-21 17:31:03,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 148 transitions, 1385 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:03,814 INFO L231 Difference]: Finished difference. Result has 104 places, 105 transitions, 945 flow [2024-06-21 17:31:03,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=945, PETRI_PLACES=104, PETRI_TRANSITIONS=105} [2024-06-21 17:31:03,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 17:31:03,815 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 105 transitions, 945 flow [2024-06-21 17:31:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:03,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:03,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:31:03,816 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:03,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1713572196, now seen corresponding path program 3 times [2024-06-21 17:31:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:03,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051744157] [2024-06-21 17:31:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:03,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:04,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:04,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051744157] [2024-06-21 17:31:04,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051744157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:04,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:04,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:31:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962425194] [2024-06-21 17:31:04,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:04,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:31:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:31:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:31:04,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:04,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 105 transitions, 945 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:04,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:04,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:04,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:05,465 INFO L124 PetriNetUnfolderBase]: 1553/2416 cut-off events. [2024-06-21 17:31:05,465 INFO L125 PetriNetUnfolderBase]: For 26832/26836 co-relation queries the response was YES. [2024-06-21 17:31:05,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12061 conditions, 2416 events. 1553/2416 cut-off events. For 26832/26836 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12110 event pairs, 412 based on Foata normal form. 17/2431 useless extension candidates. Maximal degree in co-relation 12011. Up to 2104 conditions per place. [2024-06-21 17:31:05,478 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 103 selfloop transitions, 34 changer transitions 0/141 dead transitions. [2024-06-21 17:31:05,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 141 transitions, 1340 flow [2024-06-21 17:31:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:31:05,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-21 17:31:05,479 INFO L175 Difference]: Start difference. First operand has 104 places, 105 transitions, 945 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:31:05,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 141 transitions, 1340 flow [2024-06-21 17:31:05,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 141 transitions, 1303 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:05,508 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 983 flow [2024-06-21 17:31:05,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=983, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2024-06-21 17:31:05,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 17:31:05,509 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 983 flow [2024-06-21 17:31:05,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:05,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:05,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:05,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:31:05,510 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:05,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:05,510 INFO L85 PathProgramCache]: Analyzing trace with hash -274378308, now seen corresponding path program 1 times [2024-06-21 17:31:05,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:05,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147155805] [2024-06-21 17:31:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:05,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:05,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:05,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147155805] [2024-06-21 17:31:05,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147155805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:05,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:05,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:05,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428987678] [2024-06-21 17:31:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:05,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:06,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:06,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 983 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:06,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:06,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:06,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:06,565 INFO L124 PetriNetUnfolderBase]: 1573/2448 cut-off events. [2024-06-21 17:31:06,566 INFO L125 PetriNetUnfolderBase]: For 27958/27962 co-relation queries the response was YES. [2024-06-21 17:31:06,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12436 conditions, 2448 events. 1573/2448 cut-off events. For 27958/27962 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12303 event pairs, 422 based on Foata normal form. 5/2451 useless extension candidates. Maximal degree in co-relation 12384. Up to 2335 conditions per place. [2024-06-21 17:31:06,576 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 19 changer transitions 0/118 dead transitions. [2024-06-21 17:31:06,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 1269 flow [2024-06-21 17:31:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:31:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:31:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 17:31:06,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-21 17:31:06,577 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 983 flow. Second operand 5 states and 92 transitions. [2024-06-21 17:31:06,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 1269 flow [2024-06-21 17:31:06,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 1188 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:31:06,610 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 983 flow [2024-06-21 17:31:06,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=983, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-21 17:31:06,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-21 17:31:06,610 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 983 flow [2024-06-21 17:31:06,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:06,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:06,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:06,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:31:06,611 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:06,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:06,612 INFO L85 PathProgramCache]: Analyzing trace with hash -366709414, now seen corresponding path program 2 times [2024-06-21 17:31:06,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:06,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503888340] [2024-06-21 17:31:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:06,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:07,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:07,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503888340] [2024-06-21 17:31:07,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503888340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:07,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:07,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:07,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738001727] [2024-06-21 17:31:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:07,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:07,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:07,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:07,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 983 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:07,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:07,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:07,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:07,690 INFO L124 PetriNetUnfolderBase]: 1561/2432 cut-off events. [2024-06-21 17:31:07,690 INFO L125 PetriNetUnfolderBase]: For 29484/29488 co-relation queries the response was YES. [2024-06-21 17:31:07,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 2432 events. 1561/2432 cut-off events. For 29484/29488 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12228 event pairs, 420 based on Foata normal form. 5/2435 useless extension candidates. Maximal degree in co-relation 12470. Up to 2303 conditions per place. [2024-06-21 17:31:07,705 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 98 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-21 17:31:07,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 124 transitions, 1301 flow [2024-06-21 17:31:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:31:07,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-21 17:31:07,707 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 983 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:31:07,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 124 transitions, 1301 flow [2024-06-21 17:31:07,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 1248 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:07,748 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 1018 flow [2024-06-21 17:31:07,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1018, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-21 17:31:07,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 17:31:07,748 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 1018 flow [2024-06-21 17:31:07,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:07,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:07,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:07,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:31:07,749 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:07,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1163111206, now seen corresponding path program 1 times [2024-06-21 17:31:07,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:07,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763604797] [2024-06-21 17:31:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:07,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:08,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:08,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763604797] [2024-06-21 17:31:08,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763604797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:08,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:08,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:08,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091397944] [2024-06-21 17:31:08,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:08,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:08,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:08,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:08,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:08,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 1018 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:08,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:08,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:08,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:08,745 INFO L124 PetriNetUnfolderBase]: 1470/2338 cut-off events. [2024-06-21 17:31:08,745 INFO L125 PetriNetUnfolderBase]: For 30255/30257 co-relation queries the response was YES. [2024-06-21 17:31:08,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12433 conditions, 2338 events. 1470/2338 cut-off events. For 30255/30257 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11857 event pairs, 402 based on Foata normal form. 3/2335 useless extension candidates. Maximal degree in co-relation 12379. Up to 2172 conditions per place. [2024-06-21 17:31:08,759 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 27 changer transitions 0/137 dead transitions. [2024-06-21 17:31:08,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 137 transitions, 1462 flow [2024-06-21 17:31:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:31:08,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 17:31:08,760 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 1018 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:31:08,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 137 transitions, 1462 flow [2024-06-21 17:31:08,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 137 transitions, 1402 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:08,793 INFO L231 Difference]: Finished difference. Result has 111 places, 117 transitions, 1101 flow [2024-06-21 17:31:08,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1101, PETRI_PLACES=111, PETRI_TRANSITIONS=117} [2024-06-21 17:31:08,793 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-21 17:31:08,793 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 117 transitions, 1101 flow [2024-06-21 17:31:08,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:08,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:08,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:08,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:31:08,794 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:08,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -98998114, now seen corresponding path program 1 times [2024-06-21 17:31:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:08,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57321388] [2024-06-21 17:31:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:08,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57321388] [2024-06-21 17:31:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57321388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:09,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223313843] [2024-06-21 17:31:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:09,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:09,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:09,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 117 transitions, 1101 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:09,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:09,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:09,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:09,707 INFO L124 PetriNetUnfolderBase]: 1607/2497 cut-off events. [2024-06-21 17:31:09,707 INFO L125 PetriNetUnfolderBase]: For 33979/33979 co-relation queries the response was YES. [2024-06-21 17:31:09,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13379 conditions, 2497 events. 1607/2497 cut-off events. For 33979/33979 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12541 event pairs, 407 based on Foata normal form. 2/2498 useless extension candidates. Maximal degree in co-relation 13324. Up to 2410 conditions per place. [2024-06-21 17:31:09,723 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 126 selfloop transitions, 20 changer transitions 0/150 dead transitions. [2024-06-21 17:31:09,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 150 transitions, 1599 flow [2024-06-21 17:31:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:31:09,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 17:31:09,724 INFO L175 Difference]: Start difference. First operand has 111 places, 117 transitions, 1101 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:31:09,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 150 transitions, 1599 flow [2024-06-21 17:31:09,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 150 transitions, 1544 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:09,763 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 1245 flow [2024-06-21 17:31:09,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-06-21 17:31:09,764 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-21 17:31:09,764 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 1245 flow [2024-06-21 17:31:09,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:09,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:09,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:09,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:31:09,764 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:09,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:09,765 INFO L85 PathProgramCache]: Analyzing trace with hash -98998300, now seen corresponding path program 2 times [2024-06-21 17:31:09,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:09,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815845272] [2024-06-21 17:31:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:09,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:10,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:10,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815845272] [2024-06-21 17:31:10,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815845272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:10,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:10,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42794242] [2024-06-21 17:31:10,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:10,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:10,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:10,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 1245 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:10,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:10,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:10,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:10,883 INFO L124 PetriNetUnfolderBase]: 1542/2435 cut-off events. [2024-06-21 17:31:10,884 INFO L125 PetriNetUnfolderBase]: For 37257/37257 co-relation queries the response was YES. [2024-06-21 17:31:10,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13703 conditions, 2435 events. 1542/2435 cut-off events. For 37257/37257 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12303 event pairs, 397 based on Foata normal form. 3/2436 useless extension candidates. Maximal degree in co-relation 13643. Up to 2278 conditions per place. [2024-06-21 17:31:10,901 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 116 selfloop transitions, 27 changer transitions 0/154 dead transitions. [2024-06-21 17:31:10,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1668 flow [2024-06-21 17:31:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:31:10,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:31:10,902 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 1245 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:31:10,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1668 flow [2024-06-21 17:31:10,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 154 transitions, 1648 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 17:31:10,957 INFO L231 Difference]: Finished difference. Result has 124 places, 138 transitions, 1367 flow [2024-06-21 17:31:10,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1367, PETRI_PLACES=124, PETRI_TRANSITIONS=138} [2024-06-21 17:31:10,958 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 17:31:10,958 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 138 transitions, 1367 flow [2024-06-21 17:31:10,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:10,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:10,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:10,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:31:10,959 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:10,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:10,959 INFO L85 PathProgramCache]: Analyzing trace with hash -366703462, now seen corresponding path program 2 times [2024-06-21 17:31:10,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:10,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135262082] [2024-06-21 17:31:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:10,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:11,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135262082] [2024-06-21 17:31:11,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135262082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:11,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:11,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:11,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223281715] [2024-06-21 17:31:11,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:11,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:11,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:11,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:11,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 138 transitions, 1367 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:11,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:11,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:11,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:11,917 INFO L124 PetriNetUnfolderBase]: 1642/2550 cut-off events. [2024-06-21 17:31:11,917 INFO L125 PetriNetUnfolderBase]: For 40465/40465 co-relation queries the response was YES. [2024-06-21 17:31:11,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14467 conditions, 2550 events. 1642/2550 cut-off events. For 40465/40465 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12793 event pairs, 406 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 14404. Up to 2485 conditions per place. [2024-06-21 17:31:11,933 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 12 changer transitions 0/152 dead transitions. [2024-06-21 17:31:11,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 152 transitions, 1724 flow [2024-06-21 17:31:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:31:11,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 17:31:11,934 INFO L175 Difference]: Start difference. First operand has 124 places, 138 transitions, 1367 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:31:11,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 152 transitions, 1724 flow [2024-06-21 17:31:11,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 152 transitions, 1643 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:11,976 INFO L231 Difference]: Finished difference. Result has 126 places, 141 transitions, 1347 flow [2024-06-21 17:31:11,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1347, PETRI_PLACES=126, PETRI_TRANSITIONS=141} [2024-06-21 17:31:11,977 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 17:31:11,977 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 141 transitions, 1347 flow [2024-06-21 17:31:11,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:11,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:11,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:11,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:31:11,977 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:11,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash -366940798, now seen corresponding path program 3 times [2024-06-21 17:31:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:11,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469369852] [2024-06-21 17:31:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:11,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:12,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469369852] [2024-06-21 17:31:12,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469369852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:12,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:12,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:12,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566195919] [2024-06-21 17:31:12,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:12,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:12,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:12,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:12,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 141 transitions, 1347 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:12,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:12,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:12,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:12,977 INFO L124 PetriNetUnfolderBase]: 1543/2437 cut-off events. [2024-06-21 17:31:12,977 INFO L125 PetriNetUnfolderBase]: For 42417/42417 co-relation queries the response was YES. [2024-06-21 17:31:12,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13903 conditions, 2437 events. 1543/2437 cut-off events. For 42417/42417 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12337 event pairs, 399 based on Foata normal form. 3/2438 useless extension candidates. Maximal degree in co-relation 13839. Up to 2253 conditions per place. [2024-06-21 17:31:12,996 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 28 changer transitions 0/158 dead transitions. [2024-06-21 17:31:12,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 158 transitions, 1697 flow [2024-06-21 17:31:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 17:31:12,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 17:31:12,999 INFO L175 Difference]: Start difference. First operand has 126 places, 141 transitions, 1347 flow. Second operand 6 states and 115 transitions. [2024-06-21 17:31:12,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 158 transitions, 1697 flow [2024-06-21 17:31:13,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 158 transitions, 1640 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:13,067 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 1361 flow [2024-06-21 17:31:13,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1361, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2024-06-21 17:31:13,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-21 17:31:13,068 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 1361 flow [2024-06-21 17:31:13,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:13,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:13,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:13,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:31:13,068 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:13,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash -366940612, now seen corresponding path program 3 times [2024-06-21 17:31:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238670928] [2024-06-21 17:31:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:13,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:13,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238670928] [2024-06-21 17:31:13,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238670928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:13,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:13,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:13,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672745339] [2024-06-21 17:31:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:13,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:13,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:13,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:13,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:13,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:13,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 1361 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:13,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:13,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:13,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:13,989 INFO L124 PetriNetUnfolderBase]: 1627/2530 cut-off events. [2024-06-21 17:31:13,990 INFO L125 PetriNetUnfolderBase]: For 44322/44322 co-relation queries the response was YES. [2024-06-21 17:31:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14507 conditions, 2530 events. 1627/2530 cut-off events. For 44322/44322 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12704 event pairs, 405 based on Foata normal form. 2/2531 useless extension candidates. Maximal degree in co-relation 14443. Up to 2438 conditions per place. [2024-06-21 17:31:14,005 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 24 changer transitions 0/158 dead transitions. [2024-06-21 17:31:14,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 158 transitions, 1733 flow [2024-06-21 17:31:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:31:14,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:31:14,006 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 1361 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:31:14,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 158 transitions, 1733 flow [2024-06-21 17:31:14,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 158 transitions, 1656 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:14,063 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1373 flow [2024-06-21 17:31:14,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1373, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-06-21 17:31:14,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-21 17:31:14,064 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1373 flow [2024-06-21 17:31:14,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:14,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:14,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:14,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:31:14,064 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:14,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash -366694534, now seen corresponding path program 1 times [2024-06-21 17:31:14,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:14,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289310396] [2024-06-21 17:31:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:14,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:14,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289310396] [2024-06-21 17:31:14,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289310396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:14,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:14,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567042423] [2024-06-21 17:31:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:14,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:14,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:14,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1373 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:14,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:14,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:14,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:15,343 INFO L124 PetriNetUnfolderBase]: 1622/2521 cut-off events. [2024-06-21 17:31:15,343 INFO L125 PetriNetUnfolderBase]: For 46670/46670 co-relation queries the response was YES. [2024-06-21 17:31:15,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14549 conditions, 2521 events. 1622/2521 cut-off events. For 46670/46670 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12587 event pairs, 405 based on Foata normal form. 2/2522 useless extension candidates. Maximal degree in co-relation 14483. Up to 2455 conditions per place. [2024-06-21 17:31:15,357 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 139 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2024-06-21 17:31:15,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 156 transitions, 1727 flow [2024-06-21 17:31:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:31:15,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 17:31:15,358 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1373 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:31:15,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 156 transitions, 1727 flow [2024-06-21 17:31:15,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 156 transitions, 1686 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:15,411 INFO L231 Difference]: Finished difference. Result has 132 places, 145 transitions, 1383 flow [2024-06-21 17:31:15,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1383, PETRI_PLACES=132, PETRI_TRANSITIONS=145} [2024-06-21 17:31:15,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-21 17:31:15,413 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 145 transitions, 1383 flow [2024-06-21 17:31:15,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:15,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:15,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:15,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:31:15,416 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:15,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:15,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1241320983, now seen corresponding path program 1 times [2024-06-21 17:31:15,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:15,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787591518] [2024-06-21 17:31:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:16,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:16,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787591518] [2024-06-21 17:31:16,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787591518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:16,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:16,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:31:16,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940868126] [2024-06-21 17:31:16,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:16,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:31:16,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:16,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:31:16,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:31:16,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:16,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 145 transitions, 1383 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:16,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:16,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:16,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:17,007 INFO L124 PetriNetUnfolderBase]: 1663/2591 cut-off events. [2024-06-21 17:31:17,007 INFO L125 PetriNetUnfolderBase]: For 49280/49284 co-relation queries the response was YES. [2024-06-21 17:31:17,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14915 conditions, 2591 events. 1663/2591 cut-off events. For 49280/49284 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12981 event pairs, 280 based on Foata normal form. 13/2602 useless extension candidates. Maximal degree in co-relation 14849. Up to 2366 conditions per place. [2024-06-21 17:31:17,023 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 157 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2024-06-21 17:31:17,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 176 transitions, 1830 flow [2024-06-21 17:31:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:31:17,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:31:17,025 INFO L175 Difference]: Start difference. First operand has 132 places, 145 transitions, 1383 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:31:17,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 176 transitions, 1830 flow [2024-06-21 17:31:17,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1793 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:17,088 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1404 flow [2024-06-21 17:31:17,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1404, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-06-21 17:31:17,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-21 17:31:17,089 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1404 flow [2024-06-21 17:31:17,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:17,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:17,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:17,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:31:17,090 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:17,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash -700601129, now seen corresponding path program 2 times [2024-06-21 17:31:17,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844388667] [2024-06-21 17:31:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:17,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:18,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:18,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844388667] [2024-06-21 17:31:18,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844388667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:18,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:18,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:31:18,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309697887] [2024-06-21 17:31:18,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:18,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:31:18,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:18,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:31:18,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:31:18,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:18,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1404 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:18,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:18,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:18,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:18,813 INFO L124 PetriNetUnfolderBase]: 1643/2559 cut-off events. [2024-06-21 17:31:18,813 INFO L125 PetriNetUnfolderBase]: For 50029/50033 co-relation queries the response was YES. [2024-06-21 17:31:18,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14729 conditions, 2559 events. 1643/2559 cut-off events. For 50029/50033 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12833 event pairs, 378 based on Foata normal form. 13/2570 useless extension candidates. Maximal degree in co-relation 14662. Up to 2232 conditions per place. [2024-06-21 17:31:18,829 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 30 changer transitions 0/177 dead transitions. [2024-06-21 17:31:18,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 177 transitions, 1822 flow [2024-06-21 17:31:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:31:18,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:31:18,830 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1404 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:31:18,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 177 transitions, 1822 flow [2024-06-21 17:31:18,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 177 transitions, 1784 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:18,887 INFO L231 Difference]: Finished difference. Result has 137 places, 145 transitions, 1394 flow [2024-06-21 17:31:18,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1394, PETRI_PLACES=137, PETRI_TRANSITIONS=145} [2024-06-21 17:31:18,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 17:31:18,888 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 145 transitions, 1394 flow [2024-06-21 17:31:18,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:18,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:18,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:18,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:31:18,889 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:18,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:18,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1222212041, now seen corresponding path program 1 times [2024-06-21 17:31:18,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:18,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632344683] [2024-06-21 17:31:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:18,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:19,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:19,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632344683] [2024-06-21 17:31:19,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632344683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:19,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:19,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:19,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704255660] [2024-06-21 17:31:19,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:19,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:19,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:19,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:19,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 145 transitions, 1394 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:19,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:19,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:19,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:20,179 INFO L124 PetriNetUnfolderBase]: 1595/2512 cut-off events. [2024-06-21 17:31:20,179 INFO L125 PetriNetUnfolderBase]: For 52085/52085 co-relation queries the response was YES. [2024-06-21 17:31:20,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14682 conditions, 2512 events. 1595/2512 cut-off events. For 52085/52085 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12695 event pairs, 390 based on Foata normal form. 3/2513 useless extension candidates. Maximal degree in co-relation 14614. Up to 2210 conditions per place. [2024-06-21 17:31:20,197 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 114 selfloop transitions, 50 changer transitions 0/178 dead transitions. [2024-06-21 17:31:20,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 178 transitions, 1962 flow [2024-06-21 17:31:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:31:20,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-21 17:31:20,201 INFO L175 Difference]: Start difference. First operand has 137 places, 145 transitions, 1394 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:31:20,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 178 transitions, 1962 flow [2024-06-21 17:31:20,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 178 transitions, 1868 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:31:20,280 INFO L231 Difference]: Finished difference. Result has 139 places, 153 transitions, 1534 flow [2024-06-21 17:31:20,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1534, PETRI_PLACES=139, PETRI_TRANSITIONS=153} [2024-06-21 17:31:20,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-21 17:31:20,280 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 153 transitions, 1534 flow [2024-06-21 17:31:20,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:20,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:20,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:20,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:31:20,281 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:20,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1696710498, now seen corresponding path program 1 times [2024-06-21 17:31:20,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:20,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310447961] [2024-06-21 17:31:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:20,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:20,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:20,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310447961] [2024-06-21 17:31:20,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310447961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:20,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:20,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:20,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747142972] [2024-06-21 17:31:20,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:20,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:20,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:20,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:20,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:20,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 153 transitions, 1534 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:20,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:20,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:20,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:21,360 INFO L124 PetriNetUnfolderBase]: 1684/2617 cut-off events. [2024-06-21 17:31:21,360 INFO L125 PetriNetUnfolderBase]: For 57474/57474 co-relation queries the response was YES. [2024-06-21 17:31:21,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15815 conditions, 2617 events. 1684/2617 cut-off events. For 57474/57474 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13117 event pairs, 396 based on Foata normal form. 2/2618 useless extension candidates. Maximal degree in co-relation 15747. Up to 2480 conditions per place. [2024-06-21 17:31:21,378 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 151 selfloop transitions, 35 changer transitions 0/190 dead transitions. [2024-06-21 17:31:21,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 190 transitions, 2167 flow [2024-06-21 17:31:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:31:21,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:31:21,379 INFO L175 Difference]: Start difference. First operand has 139 places, 153 transitions, 1534 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:31:21,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 190 transitions, 2167 flow [2024-06-21 17:31:21,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 190 transitions, 2055 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:21,454 INFO L231 Difference]: Finished difference. Result has 144 places, 166 transitions, 1664 flow [2024-06-21 17:31:21,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1664, PETRI_PLACES=144, PETRI_TRANSITIONS=166} [2024-06-21 17:31:21,455 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 17:31:21,455 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 166 transitions, 1664 flow [2024-06-21 17:31:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:21,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:21,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:21,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:31:21,455 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:21,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1700435148, now seen corresponding path program 2 times [2024-06-21 17:31:21,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:21,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117333902] [2024-06-21 17:31:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:21,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:22,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:22,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117333902] [2024-06-21 17:31:22,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117333902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:22,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:22,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:22,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196410445] [2024-06-21 17:31:22,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:22,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:22,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:22,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:22,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 166 transitions, 1664 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:22,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:22,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:22,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:22,635 INFO L124 PetriNetUnfolderBase]: 1710/2655 cut-off events. [2024-06-21 17:31:22,635 INFO L125 PetriNetUnfolderBase]: For 62639/62639 co-relation queries the response was YES. [2024-06-21 17:31:22,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16503 conditions, 2655 events. 1710/2655 cut-off events. For 62639/62639 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13347 event pairs, 398 based on Foata normal form. 2/2656 useless extension candidates. Maximal degree in co-relation 16431. Up to 2543 conditions per place. [2024-06-21 17:31:22,656 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 159 selfloop transitions, 33 changer transitions 0/196 dead transitions. [2024-06-21 17:31:22,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 196 transitions, 2255 flow [2024-06-21 17:31:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:31:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:31:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 17:31:22,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 17:31:22,657 INFO L175 Difference]: Start difference. First operand has 144 places, 166 transitions, 1664 flow. Second operand 10 states and 162 transitions. [2024-06-21 17:31:22,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 196 transitions, 2255 flow [2024-06-21 17:31:22,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 196 transitions, 2181 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:22,746 INFO L231 Difference]: Finished difference. Result has 152 places, 174 transitions, 1761 flow [2024-06-21 17:31:22,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1761, PETRI_PLACES=152, PETRI_TRANSITIONS=174} [2024-06-21 17:31:22,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-21 17:31:22,746 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 174 transitions, 1761 flow [2024-06-21 17:31:22,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:22,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:22,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:22,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:31:22,747 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:22,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:22,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1226021321, now seen corresponding path program 2 times [2024-06-21 17:31:22,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:22,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376022677] [2024-06-21 17:31:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:22,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:23,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:23,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376022677] [2024-06-21 17:31:23,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376022677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:23,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:23,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:23,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669198053] [2024-06-21 17:31:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:23,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:23,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:23,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 174 transitions, 1761 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:23,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:23,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:23,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:24,136 INFO L124 PetriNetUnfolderBase]: 1660/2598 cut-off events. [2024-06-21 17:31:24,136 INFO L125 PetriNetUnfolderBase]: For 66412/66412 co-relation queries the response was YES. [2024-06-21 17:31:24,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16311 conditions, 2598 events. 1660/2598 cut-off events. For 66412/66412 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13108 event pairs, 393 based on Foata normal form. 3/2599 useless extension candidates. Maximal degree in co-relation 16236. Up to 2390 conditions per place. [2024-06-21 17:31:24,154 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 141 selfloop transitions, 34 changer transitions 0/195 dead transitions. [2024-06-21 17:31:24,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 195 transitions, 2243 flow [2024-06-21 17:31:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:31:24,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:31:24,155 INFO L175 Difference]: Start difference. First operand has 152 places, 174 transitions, 1761 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:31:24,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 195 transitions, 2243 flow [2024-06-21 17:31:24,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 195 transitions, 2206 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:24,246 INFO L231 Difference]: Finished difference. Result has 156 places, 178 transitions, 1864 flow [2024-06-21 17:31:24,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1864, PETRI_PLACES=156, PETRI_TRANSITIONS=178} [2024-06-21 17:31:24,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-21 17:31:24,246 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 178 transitions, 1864 flow [2024-06-21 17:31:24,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:24,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:24,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:24,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:31:24,246 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:24,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:24,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1226021476, now seen corresponding path program 3 times [2024-06-21 17:31:24,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:24,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607598317] [2024-06-21 17:31:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:24,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:24,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:24,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607598317] [2024-06-21 17:31:24,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607598317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:24,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:24,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:24,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405572301] [2024-06-21 17:31:24,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:24,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:24,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:24,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:24,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 178 transitions, 1864 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:24,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:24,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:24,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:25,467 INFO L124 PetriNetUnfolderBase]: 1719/2668 cut-off events. [2024-06-21 17:31:25,467 INFO L125 PetriNetUnfolderBase]: For 69514/69514 co-relation queries the response was YES. [2024-06-21 17:31:25,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16975 conditions, 2668 events. 1719/2668 cut-off events. For 69514/69514 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13423 event pairs, 397 based on Foata normal form. 2/2669 useless extension candidates. Maximal degree in co-relation 16898. Up to 2559 conditions per place. [2024-06-21 17:31:25,486 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 161 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-21 17:31:25,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 197 transitions, 2308 flow [2024-06-21 17:31:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:31:25,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:31:25,488 INFO L175 Difference]: Start difference. First operand has 156 places, 178 transitions, 1864 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:31:25,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 197 transitions, 2308 flow [2024-06-21 17:31:25,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 197 transitions, 2200 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:25,598 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1826 flow [2024-06-21 17:31:25,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1826, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-21 17:31:25,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 17:31:25,599 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1826 flow [2024-06-21 17:31:25,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:25,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:25,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:25,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:31:25,599 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:25,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1399461127, now seen corresponding path program 1 times [2024-06-21 17:31:25,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:25,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478771495] [2024-06-21 17:31:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:25,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:26,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:26,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478771495] [2024-06-21 17:31:26,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478771495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:26,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:26,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:26,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647017591] [2024-06-21 17:31:26,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:26,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:26,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:26,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:26,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1826 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:26,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:26,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:26,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:26,749 INFO L124 PetriNetUnfolderBase]: 1716/2662 cut-off events. [2024-06-21 17:31:26,749 INFO L125 PetriNetUnfolderBase]: For 72913/72913 co-relation queries the response was YES. [2024-06-21 17:31:26,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16973 conditions, 2662 events. 1716/2662 cut-off events. For 72913/72913 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13440 event pairs, 401 based on Foata normal form. 1/2662 useless extension candidates. Maximal degree in co-relation 16895. Up to 2593 conditions per place. [2024-06-21 17:31:26,769 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 171 selfloop transitions, 17 changer transitions 0/192 dead transitions. [2024-06-21 17:31:26,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 192 transitions, 2266 flow [2024-06-21 17:31:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:31:26,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 17:31:26,770 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1826 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:31:26,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 192 transitions, 2266 flow [2024-06-21 17:31:26,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 192 transitions, 2202 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:31:26,872 INFO L231 Difference]: Finished difference. Result has 157 places, 181 transitions, 1842 flow [2024-06-21 17:31:26,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1842, PETRI_PLACES=157, PETRI_TRANSITIONS=181} [2024-06-21 17:31:26,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-21 17:31:26,872 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 181 transitions, 1842 flow [2024-06-21 17:31:26,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:26,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:26,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:26,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:31:26,873 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:26,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:26,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1399251660, now seen corresponding path program 4 times [2024-06-21 17:31:26,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:26,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261161112] [2024-06-21 17:31:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:26,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261161112] [2024-06-21 17:31:27,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261161112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:27,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:27,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:27,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261444424] [2024-06-21 17:31:27,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:27,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:27,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:27,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:27,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:27,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 181 transitions, 1842 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:27,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:27,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:27,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:28,002 INFO L124 PetriNetUnfolderBase]: 1742/2700 cut-off events. [2024-06-21 17:31:28,002 INFO L125 PetriNetUnfolderBase]: For 78298/78298 co-relation queries the response was YES. [2024-06-21 17:31:28,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17555 conditions, 2700 events. 1742/2700 cut-off events. For 78298/78298 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13608 event pairs, 401 based on Foata normal form. 2/2701 useless extension candidates. Maximal degree in co-relation 17476. Up to 2577 conditions per place. [2024-06-21 17:31:28,025 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 174 selfloop transitions, 29 changer transitions 0/207 dead transitions. [2024-06-21 17:31:28,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 2508 flow [2024-06-21 17:31:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:31:28,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:31:28,026 INFO L175 Difference]: Start difference. First operand has 157 places, 181 transitions, 1842 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:31:28,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 2508 flow [2024-06-21 17:31:28,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 207 transitions, 2473 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:28,134 INFO L231 Difference]: Finished difference. Result has 162 places, 188 transitions, 1964 flow [2024-06-21 17:31:28,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1964, PETRI_PLACES=162, PETRI_TRANSITIONS=188} [2024-06-21 17:31:28,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 17:31:28,135 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 188 transitions, 1964 flow [2024-06-21 17:31:28,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:28,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:28,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:28,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:31:28,135 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:28,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:28,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1509738630, now seen corresponding path program 5 times [2024-06-21 17:31:28,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:28,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445244924] [2024-06-21 17:31:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:28,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:28,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:28,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445244924] [2024-06-21 17:31:28,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445244924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:28,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:28,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:28,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624738426] [2024-06-21 17:31:28,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:28,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:28,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:28,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:28,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:28,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:28,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 188 transitions, 1964 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:28,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:28,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:28,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:29,294 INFO L124 PetriNetUnfolderBase]: 1736/2692 cut-off events. [2024-06-21 17:31:29,294 INFO L125 PetriNetUnfolderBase]: For 81868/81868 co-relation queries the response was YES. [2024-06-21 17:31:29,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17692 conditions, 2692 events. 1736/2692 cut-off events. For 81868/81868 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13601 event pairs, 397 based on Foata normal form. 2/2693 useless extension candidates. Maximal degree in co-relation 17610. Up to 2572 conditions per place. [2024-06-21 17:31:29,315 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 174 selfloop transitions, 31 changer transitions 0/209 dead transitions. [2024-06-21 17:31:29,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 209 transitions, 2502 flow [2024-06-21 17:31:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:31:29,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-21 17:31:29,317 INFO L175 Difference]: Start difference. First operand has 162 places, 188 transitions, 1964 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:31:29,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 209 transitions, 2502 flow [2024-06-21 17:31:29,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 209 transitions, 2437 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:29,438 INFO L231 Difference]: Finished difference. Result has 166 places, 188 transitions, 1967 flow [2024-06-21 17:31:29,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1967, PETRI_PLACES=166, PETRI_TRANSITIONS=188} [2024-06-21 17:31:29,438 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-21 17:31:29,438 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 188 transitions, 1967 flow [2024-06-21 17:31:29,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:29,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:29,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:29,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:31:29,438 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:29,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:29,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1509738475, now seen corresponding path program 3 times [2024-06-21 17:31:29,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:29,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382687745] [2024-06-21 17:31:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:29,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:30,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382687745] [2024-06-21 17:31:30,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382687745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:30,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:30,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:30,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377352616] [2024-06-21 17:31:30,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:30,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:30,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:30,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:30,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:30,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 188 transitions, 1967 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:30,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:30,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:30,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:30,789 INFO L124 PetriNetUnfolderBase]: 1661/2601 cut-off events. [2024-06-21 17:31:30,789 INFO L125 PetriNetUnfolderBase]: For 84254/84254 co-relation queries the response was YES. [2024-06-21 17:31:30,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17024 conditions, 2601 events. 1661/2601 cut-off events. For 84254/84254 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13200 event pairs, 395 based on Foata normal form. 3/2602 useless extension candidates. Maximal degree in co-relation 16941. Up to 2333 conditions per place. [2024-06-21 17:31:30,810 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 41 changer transitions 0/209 dead transitions. [2024-06-21 17:31:30,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 209 transitions, 2415 flow [2024-06-21 17:31:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 17:31:30,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:31:30,811 INFO L175 Difference]: Start difference. First operand has 166 places, 188 transitions, 1967 flow. Second operand 7 states and 133 transitions. [2024-06-21 17:31:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 209 transitions, 2415 flow [2024-06-21 17:31:30,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 209 transitions, 2283 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:30,922 INFO L231 Difference]: Finished difference. Result has 167 places, 188 transitions, 1932 flow [2024-06-21 17:31:30,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=167, PETRI_TRANSITIONS=188} [2024-06-21 17:31:30,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-21 17:31:30,923 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 188 transitions, 1932 flow [2024-06-21 17:31:30,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:30,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:30,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:30,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:31:30,923 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:30,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1517095860, now seen corresponding path program 6 times [2024-06-21 17:31:30,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:30,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305814299] [2024-06-21 17:31:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:30,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:31,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:31,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305814299] [2024-06-21 17:31:31,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305814299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:31,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:31,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:31,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77079790] [2024-06-21 17:31:31,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:31,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:31,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:31,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:31,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 188 transitions, 1932 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:31,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:31,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:31,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:32,077 INFO L124 PetriNetUnfolderBase]: 1721/2670 cut-off events. [2024-06-21 17:31:32,077 INFO L125 PetriNetUnfolderBase]: For 86677/86677 co-relation queries the response was YES. [2024-06-21 17:31:32,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17559 conditions, 2670 events. 1721/2670 cut-off events. For 86677/86677 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13406 event pairs, 398 based on Foata normal form. 2/2671 useless extension candidates. Maximal degree in co-relation 17476. Up to 2599 conditions per place. [2024-06-21 17:31:32,094 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 183 selfloop transitions, 15 changer transitions 0/202 dead transitions. [2024-06-21 17:31:32,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 202 transitions, 2377 flow [2024-06-21 17:31:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:31:32,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 17:31:32,095 INFO L175 Difference]: Start difference. First operand has 167 places, 188 transitions, 1932 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:31:32,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 202 transitions, 2377 flow [2024-06-21 17:31:32,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 202 transitions, 2271 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:32,219 INFO L231 Difference]: Finished difference. Result has 168 places, 189 transitions, 1873 flow [2024-06-21 17:31:32,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1873, PETRI_PLACES=168, PETRI_TRANSITIONS=189} [2024-06-21 17:31:32,219 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-21 17:31:32,219 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 189 transitions, 1873 flow [2024-06-21 17:31:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:32,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:32,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:31:32,220 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:32,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1662922371, now seen corresponding path program 1 times [2024-06-21 17:31:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:32,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760025992] [2024-06-21 17:31:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:32,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:32,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:32,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760025992] [2024-06-21 17:31:32,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760025992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:32,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:32,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193884601] [2024-06-21 17:31:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:32,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:32,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 189 transitions, 1873 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:32,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:32,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:32,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:33,363 INFO L124 PetriNetUnfolderBase]: 1815/2813 cut-off events. [2024-06-21 17:31:33,363 INFO L125 PetriNetUnfolderBase]: For 96457/96463 co-relation queries the response was YES. [2024-06-21 17:31:33,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18583 conditions, 2813 events. 1815/2813 cut-off events. For 96457/96463 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14214 event pairs, 402 based on Foata normal form. 10/2822 useless extension candidates. Maximal degree in co-relation 18499. Up to 2615 conditions per place. [2024-06-21 17:31:33,382 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 177 selfloop transitions, 46 changer transitions 0/227 dead transitions. [2024-06-21 17:31:33,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 227 transitions, 2705 flow [2024-06-21 17:31:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:31:33,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:31:33,383 INFO L175 Difference]: Start difference. First operand has 168 places, 189 transitions, 1873 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:31:33,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 227 transitions, 2705 flow [2024-06-21 17:31:33,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 227 transitions, 2668 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:33,552 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 2224 flow [2024-06-21 17:31:33,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2224, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-21 17:31:33,553 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-21 17:31:33,553 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 2224 flow [2024-06-21 17:31:33,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:33,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:33,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:33,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:31:33,553 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:33,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2129583495, now seen corresponding path program 2 times [2024-06-21 17:31:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:33,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644253116] [2024-06-21 17:31:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:34,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:34,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644253116] [2024-06-21 17:31:34,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644253116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:34,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:34,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:34,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120730060] [2024-06-21 17:31:34,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:34,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:34,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:34,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 2224 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:34,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:34,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:34,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:34,705 INFO L124 PetriNetUnfolderBase]: 1835/2843 cut-off events. [2024-06-21 17:31:34,705 INFO L125 PetriNetUnfolderBase]: For 104228/104234 co-relation queries the response was YES. [2024-06-21 17:31:34,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19706 conditions, 2843 events. 1835/2843 cut-off events. For 104228/104234 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14397 event pairs, 424 based on Foata normal form. 10/2852 useless extension candidates. Maximal degree in co-relation 19619. Up to 2730 conditions per place. [2024-06-21 17:31:34,728 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 194 selfloop transitions, 22 changer transitions 0/220 dead transitions. [2024-06-21 17:31:34,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 220 transitions, 2755 flow [2024-06-21 17:31:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 17:31:34,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:31:34,729 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 2224 flow. Second operand 6 states and 104 transitions. [2024-06-21 17:31:34,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 220 transitions, 2755 flow [2024-06-21 17:31:34,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 220 transitions, 2694 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 17:31:34,939 INFO L231 Difference]: Finished difference. Result has 177 places, 209 transitions, 2278 flow [2024-06-21 17:31:34,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2278, PETRI_PLACES=177, PETRI_TRANSITIONS=209} [2024-06-21 17:31:34,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-21 17:31:34,940 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 209 transitions, 2278 flow [2024-06-21 17:31:34,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:34,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:34,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:34,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:31:34,941 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:34,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:34,942 INFO L85 PathProgramCache]: Analyzing trace with hash -193722271, now seen corresponding path program 3 times [2024-06-21 17:31:34,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:34,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435075022] [2024-06-21 17:31:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:34,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:35,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:35,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435075022] [2024-06-21 17:31:35,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435075022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:35,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:35,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:35,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579517752] [2024-06-21 17:31:35,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:35,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:35,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:35,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:35,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 209 transitions, 2278 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:35,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:35,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:35,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:36,111 INFO L124 PetriNetUnfolderBase]: 1823/2825 cut-off events. [2024-06-21 17:31:36,111 INFO L125 PetriNetUnfolderBase]: For 106261/106267 co-relation queries the response was YES. [2024-06-21 17:31:36,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19565 conditions, 2825 events. 1823/2825 cut-off events. For 106261/106267 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14315 event pairs, 400 based on Foata normal form. 10/2834 useless extension candidates. Maximal degree in co-relation 19476. Up to 2623 conditions per place. [2024-06-21 17:31:36,136 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 174 selfloop transitions, 49 changer transitions 0/227 dead transitions. [2024-06-21 17:31:36,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 227 transitions, 2810 flow [2024-06-21 17:31:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:31:36,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:31:36,137 INFO L175 Difference]: Start difference. First operand has 177 places, 209 transitions, 2278 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:31:36,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 227 transitions, 2810 flow [2024-06-21 17:31:36,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 227 transitions, 2726 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:36,361 INFO L231 Difference]: Finished difference. Result has 181 places, 210 transitions, 2349 flow [2024-06-21 17:31:36,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2349, PETRI_PLACES=181, PETRI_TRANSITIONS=210} [2024-06-21 17:31:36,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-21 17:31:36,361 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 210 transitions, 2349 flow [2024-06-21 17:31:36,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:36,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:36,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:31:36,362 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:36,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2129574567, now seen corresponding path program 1 times [2024-06-21 17:31:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918445300] [2024-06-21 17:31:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:37,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:37,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918445300] [2024-06-21 17:31:37,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918445300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:37,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:37,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120961999] [2024-06-21 17:31:37,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:37,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:37,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:37,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:37,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:37,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 210 transitions, 2349 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:37,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:37,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:37,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:38,044 INFO L124 PetriNetUnfolderBase]: 1867/2890 cut-off events. [2024-06-21 17:31:38,044 INFO L125 PetriNetUnfolderBase]: For 117483/117487 co-relation queries the response was YES. [2024-06-21 17:31:38,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20185 conditions, 2890 events. 1867/2890 cut-off events. For 117483/117487 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14665 event pairs, 440 based on Foata normal form. 13/2901 useless extension candidates. Maximal degree in co-relation 20094. Up to 2708 conditions per place. [2024-06-21 17:31:38,064 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 199 selfloop transitions, 25 changer transitions 0/228 dead transitions. [2024-06-21 17:31:38,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 228 transitions, 2917 flow [2024-06-21 17:31:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 17:31:38,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-21 17:31:38,065 INFO L175 Difference]: Start difference. First operand has 181 places, 210 transitions, 2349 flow. Second operand 6 states and 109 transitions. [2024-06-21 17:31:38,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 228 transitions, 2917 flow [2024-06-21 17:31:38,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 228 transitions, 2822 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:38,222 INFO L231 Difference]: Finished difference. Result has 181 places, 211 transitions, 2326 flow [2024-06-21 17:31:38,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2326, PETRI_PLACES=181, PETRI_TRANSITIONS=211} [2024-06-21 17:31:38,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-21 17:31:38,222 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 211 transitions, 2326 flow [2024-06-21 17:31:38,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:38,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:38,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:38,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:31:38,223 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:38,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1002552289, now seen corresponding path program 4 times [2024-06-21 17:31:38,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:38,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793690913] [2024-06-21 17:31:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:38,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:38,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:38,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793690913] [2024-06-21 17:31:38,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793690913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:38,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:38,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:38,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799893923] [2024-06-21 17:31:38,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:38,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:38,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:38,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:38,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:38,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:38,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 211 transitions, 2326 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:38,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:38,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:38,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:39,574 INFO L124 PetriNetUnfolderBase]: 1929/2983 cut-off events. [2024-06-21 17:31:39,574 INFO L125 PetriNetUnfolderBase]: For 111136/111142 co-relation queries the response was YES. [2024-06-21 17:31:39,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20756 conditions, 2983 events. 1929/2983 cut-off events. For 111136/111142 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15243 event pairs, 422 based on Foata normal form. 10/2992 useless extension candidates. Maximal degree in co-relation 20666. Up to 2765 conditions per place. [2024-06-21 17:31:39,602 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 43 changer transitions 0/246 dead transitions. [2024-06-21 17:31:39,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 246 transitions, 3162 flow [2024-06-21 17:31:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:31:39,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:31:39,603 INFO L175 Difference]: Start difference. First operand has 181 places, 211 transitions, 2326 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:31:39,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 246 transitions, 3162 flow [2024-06-21 17:31:39,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 246 transitions, 3116 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:39,780 INFO L231 Difference]: Finished difference. Result has 186 places, 220 transitions, 2516 flow [2024-06-21 17:31:39,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2516, PETRI_PLACES=186, PETRI_TRANSITIONS=220} [2024-06-21 17:31:39,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-21 17:31:39,781 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 220 transitions, 2516 flow [2024-06-21 17:31:39,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:39,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:39,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:31:39,781 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:39,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash -648289249, now seen corresponding path program 5 times [2024-06-21 17:31:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705630061] [2024-06-21 17:31:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:40,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705630061] [2024-06-21 17:31:40,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705630061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:40,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:40,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038077567] [2024-06-21 17:31:40,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:40,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:40,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:40,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:40,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 220 transitions, 2516 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:40,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:40,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:40,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:41,098 INFO L124 PetriNetUnfolderBase]: 1949/3011 cut-off events. [2024-06-21 17:31:41,098 INFO L125 PetriNetUnfolderBase]: For 118737/118743 co-relation queries the response was YES. [2024-06-21 17:31:41,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21449 conditions, 3011 events. 1949/3011 cut-off events. For 118737/118743 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15372 event pairs, 418 based on Foata normal form. 10/3020 useless extension candidates. Maximal degree in co-relation 21358. Up to 2821 conditions per place. [2024-06-21 17:31:41,126 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 197 selfloop transitions, 41 changer transitions 0/242 dead transitions. [2024-06-21 17:31:41,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 242 transitions, 3154 flow [2024-06-21 17:31:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:31:41,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:31:41,127 INFO L175 Difference]: Start difference. First operand has 186 places, 220 transitions, 2516 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:31:41,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 242 transitions, 3154 flow [2024-06-21 17:31:41,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 242 transitions, 2946 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:41,342 INFO L231 Difference]: Finished difference. Result has 188 places, 223 transitions, 2460 flow [2024-06-21 17:31:41,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2460, PETRI_PLACES=188, PETRI_TRANSITIONS=223} [2024-06-21 17:31:41,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 17:31:41,343 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 223 transitions, 2460 flow [2024-06-21 17:31:41,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:41,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:41,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:41,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:31:41,343 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:41,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:41,343 INFO L85 PathProgramCache]: Analyzing trace with hash -647873539, now seen corresponding path program 6 times [2024-06-21 17:31:41,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:41,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817579912] [2024-06-21 17:31:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:41,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:41,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:41,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817579912] [2024-06-21 17:31:41,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817579912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:41,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:41,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:41,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209757187] [2024-06-21 17:31:41,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:41,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:41,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:41,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:41,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 223 transitions, 2460 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:41,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:41,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:41,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:42,526 INFO L124 PetriNetUnfolderBase]: 1993/3078 cut-off events. [2024-06-21 17:31:42,526 INFO L125 PetriNetUnfolderBase]: For 125672/125678 co-relation queries the response was YES. [2024-06-21 17:31:42,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21896 conditions, 3078 events. 1993/3078 cut-off events. For 125672/125678 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15815 event pairs, 433 based on Foata normal form. 10/3087 useless extension candidates. Maximal degree in co-relation 21806. Up to 2723 conditions per place. [2024-06-21 17:31:42,553 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 179 selfloop transitions, 71 changer transitions 0/254 dead transitions. [2024-06-21 17:31:42,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 254 transitions, 3300 flow [2024-06-21 17:31:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:31:42,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 17:31:42,554 INFO L175 Difference]: Start difference. First operand has 188 places, 223 transitions, 2460 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:31:42,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 254 transitions, 3300 flow [2024-06-21 17:31:42,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 254 transitions, 3176 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:31:42,778 INFO L231 Difference]: Finished difference. Result has 190 places, 232 transitions, 2655 flow [2024-06-21 17:31:42,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2655, PETRI_PLACES=190, PETRI_TRANSITIONS=232} [2024-06-21 17:31:42,779 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-21 17:31:42,779 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 232 transitions, 2655 flow [2024-06-21 17:31:42,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:42,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:42,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:42,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:31:42,779 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:42,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash 426706179, now seen corresponding path program 7 times [2024-06-21 17:31:42,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:42,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76740032] [2024-06-21 17:31:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:42,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:43,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76740032] [2024-06-21 17:31:43,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76740032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:43,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:43,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:43,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619725920] [2024-06-21 17:31:43,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:43,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:43,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:43,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 232 transitions, 2655 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:43,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:43,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:43,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:44,059 INFO L124 PetriNetUnfolderBase]: 1981/3064 cut-off events. [2024-06-21 17:31:44,059 INFO L125 PetriNetUnfolderBase]: For 126051/126057 co-relation queries the response was YES. [2024-06-21 17:31:44,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22277 conditions, 3064 events. 1981/3064 cut-off events. For 126051/126057 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15760 event pairs, 432 based on Foata normal form. 10/3073 useless extension candidates. Maximal degree in co-relation 22186. Up to 2834 conditions per place. [2024-06-21 17:31:44,091 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 203 selfloop transitions, 45 changer transitions 0/252 dead transitions. [2024-06-21 17:31:44,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 252 transitions, 3253 flow [2024-06-21 17:31:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:31:44,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:31:44,092 INFO L175 Difference]: Start difference. First operand has 190 places, 232 transitions, 2655 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:31:44,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 252 transitions, 3253 flow [2024-06-21 17:31:44,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 252 transitions, 3121 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:44,328 INFO L231 Difference]: Finished difference. Result has 194 places, 232 transitions, 2627 flow [2024-06-21 17:31:44,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2627, PETRI_PLACES=194, PETRI_TRANSITIONS=232} [2024-06-21 17:31:44,329 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-21 17:31:44,329 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 232 transitions, 2627 flow [2024-06-21 17:31:44,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:44,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:44,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:44,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:31:44,329 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:44,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash -442576357, now seen corresponding path program 8 times [2024-06-21 17:31:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:44,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43456075] [2024-06-21 17:31:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:44,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:44,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:44,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43456075] [2024-06-21 17:31:44,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43456075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:44,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:44,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:44,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168686707] [2024-06-21 17:31:44,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:44,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:44,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 232 transitions, 2627 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:44,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:44,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:44,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:45,469 INFO L124 PetriNetUnfolderBase]: 2001/3094 cut-off events. [2024-06-21 17:31:45,469 INFO L125 PetriNetUnfolderBase]: For 127589/127595 co-relation queries the response was YES. [2024-06-21 17:31:45,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22140 conditions, 3094 events. 2001/3094 cut-off events. For 127589/127595 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15959 event pairs, 425 based on Foata normal form. 10/3103 useless extension candidates. Maximal degree in co-relation 22046. Up to 2731 conditions per place. [2024-06-21 17:31:45,497 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 176 selfloop transitions, 75 changer transitions 0/255 dead transitions. [2024-06-21 17:31:45,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3387 flow [2024-06-21 17:31:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:31:45,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:31:45,498 INFO L175 Difference]: Start difference. First operand has 194 places, 232 transitions, 2627 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:31:45,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3387 flow [2024-06-21 17:31:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3285 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:31:45,701 INFO L231 Difference]: Finished difference. Result has 194 places, 235 transitions, 2753 flow [2024-06-21 17:31:45,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2753, PETRI_PLACES=194, PETRI_TRANSITIONS=235} [2024-06-21 17:31:45,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-21 17:31:45,701 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 235 transitions, 2753 flow [2024-06-21 17:31:45,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:45,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:45,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:45,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:31:45,701 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:45,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:45,702 INFO L85 PathProgramCache]: Analyzing trace with hash -214675207, now seen corresponding path program 9 times [2024-06-21 17:31:45,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:45,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045448883] [2024-06-21 17:31:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:45,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:46,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:46,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045448883] [2024-06-21 17:31:46,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045448883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:46,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:46,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:46,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678668211] [2024-06-21 17:31:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:46,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:46,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:46,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:46,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 235 transitions, 2753 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:46,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:46,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:46,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:46,877 INFO L124 PetriNetUnfolderBase]: 2021/3130 cut-off events. [2024-06-21 17:31:46,877 INFO L125 PetriNetUnfolderBase]: For 124245/124251 co-relation queries the response was YES. [2024-06-21 17:31:46,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22433 conditions, 3130 events. 2021/3130 cut-off events. For 124245/124251 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16191 event pairs, 458 based on Foata normal form. 10/3139 useless extension candidates. Maximal degree in co-relation 22339. Up to 2956 conditions per place. [2024-06-21 17:31:46,905 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 219 selfloop transitions, 30 changer transitions 0/253 dead transitions. [2024-06-21 17:31:46,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 253 transitions, 3479 flow [2024-06-21 17:31:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:31:46,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:31:46,906 INFO L175 Difference]: Start difference. First operand has 194 places, 235 transitions, 2753 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:31:46,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 253 transitions, 3479 flow [2024-06-21 17:31:47,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 253 transitions, 3305 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:47,155 INFO L231 Difference]: Finished difference. Result has 195 places, 238 transitions, 2717 flow [2024-06-21 17:31:47,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2717, PETRI_PLACES=195, PETRI_TRANSITIONS=238} [2024-06-21 17:31:47,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-21 17:31:47,156 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 238 transitions, 2717 flow [2024-06-21 17:31:47,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:47,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:47,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:47,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:31:47,157 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:47,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash -608267947, now seen corresponding path program 10 times [2024-06-21 17:31:47,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:47,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234067646] [2024-06-21 17:31:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:47,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:47,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:47,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234067646] [2024-06-21 17:31:47,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234067646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:47,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:47,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:47,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52789033] [2024-06-21 17:31:47,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:47,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:47,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:47,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 238 transitions, 2717 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:47,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:47,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:47,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:48,313 INFO L124 PetriNetUnfolderBase]: 2009/3112 cut-off events. [2024-06-21 17:31:48,314 INFO L125 PetriNetUnfolderBase]: For 120485/120491 co-relation queries the response was YES. [2024-06-21 17:31:48,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21785 conditions, 3112 events. 2009/3112 cut-off events. For 120485/120491 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16120 event pairs, 460 based on Foata normal form. 10/3121 useless extension candidates. Maximal degree in co-relation 21692. Up to 2984 conditions per place. [2024-06-21 17:31:48,341 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 224 selfloop transitions, 22 changer transitions 0/250 dead transitions. [2024-06-21 17:31:48,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 250 transitions, 3259 flow [2024-06-21 17:31:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:31:48,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:31:48,343 INFO L175 Difference]: Start difference. First operand has 195 places, 238 transitions, 2717 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:31:48,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 250 transitions, 3259 flow [2024-06-21 17:31:48,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 250 transitions, 3047 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:48,568 INFO L231 Difference]: Finished difference. Result has 196 places, 238 transitions, 2555 flow [2024-06-21 17:31:48,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2555, PETRI_PLACES=196, PETRI_TRANSITIONS=238} [2024-06-21 17:31:48,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 17:31:48,569 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 238 transitions, 2555 flow [2024-06-21 17:31:48,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:48,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:48,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:48,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:31:48,569 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:48,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash -206570629, now seen corresponding path program 2 times [2024-06-21 17:31:48,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:48,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406054043] [2024-06-21 17:31:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:48,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:49,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406054043] [2024-06-21 17:31:49,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406054043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:49,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:49,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:49,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325142210] [2024-06-21 17:31:49,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:49,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:49,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:49,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:49,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:49,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 238 transitions, 2555 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:49,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:49,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:49,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:50,073 INFO L124 PetriNetUnfolderBase]: 2053/3179 cut-off events. [2024-06-21 17:31:50,074 INFO L125 PetriNetUnfolderBase]: For 129876/129880 co-relation queries the response was YES. [2024-06-21 17:31:50,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21912 conditions, 3179 events. 2053/3179 cut-off events. For 129876/129880 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16518 event pairs, 470 based on Foata normal form. 13/3190 useless extension candidates. Maximal degree in co-relation 21820. Up to 2965 conditions per place. [2024-06-21 17:31:50,103 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 228 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2024-06-21 17:31:50,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 259 transitions, 3223 flow [2024-06-21 17:31:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:31:50,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 17:31:50,104 INFO L175 Difference]: Start difference. First operand has 196 places, 238 transitions, 2555 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:31:50,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 259 transitions, 3223 flow [2024-06-21 17:31:50,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 259 transitions, 3107 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:31:50,404 INFO L231 Difference]: Finished difference. Result has 196 places, 239 transitions, 2514 flow [2024-06-21 17:31:50,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2514, PETRI_PLACES=196, PETRI_TRANSITIONS=239} [2024-06-21 17:31:50,405 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 17:31:50,405 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 239 transitions, 2514 flow [2024-06-21 17:31:50,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:50,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:50,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:50,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:31:50,405 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:50,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash -206095399, now seen corresponding path program 3 times [2024-06-21 17:31:50,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:50,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574379220] [2024-06-21 17:31:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:51,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:51,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574379220] [2024-06-21 17:31:51,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574379220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:51,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:51,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:51,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070708699] [2024-06-21 17:31:51,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:51,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:51,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:51,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 239 transitions, 2514 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:51,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:51,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:51,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:51,844 INFO L124 PetriNetUnfolderBase]: 2055/3185 cut-off events. [2024-06-21 17:31:51,844 INFO L125 PetriNetUnfolderBase]: For 128503/128507 co-relation queries the response was YES. [2024-06-21 17:31:51,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21774 conditions, 3185 events. 2055/3185 cut-off events. For 128503/128507 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16515 event pairs, 460 based on Foata normal form. 9/3192 useless extension candidates. Maximal degree in co-relation 21682. Up to 2881 conditions per place. [2024-06-21 17:31:51,871 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 229 selfloop transitions, 29 changer transitions 0/262 dead transitions. [2024-06-21 17:31:51,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 262 transitions, 3210 flow [2024-06-21 17:31:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:31:51,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:31:51,872 INFO L175 Difference]: Start difference. First operand has 196 places, 239 transitions, 2514 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:31:51,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 262 transitions, 3210 flow [2024-06-21 17:31:52,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 262 transitions, 3153 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:52,135 INFO L231 Difference]: Finished difference. Result has 198 places, 240 transitions, 2537 flow [2024-06-21 17:31:52,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2537, PETRI_PLACES=198, PETRI_TRANSITIONS=240} [2024-06-21 17:31:52,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-21 17:31:52,136 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 240 transitions, 2537 flow [2024-06-21 17:31:52,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:52,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:52,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:52,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:31:52,136 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:52,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash -766191487, now seen corresponding path program 1 times [2024-06-21 17:31:52,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:52,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840296600] [2024-06-21 17:31:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:52,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:52,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:52,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840296600] [2024-06-21 17:31:52,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840296600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:52,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461280803] [2024-06-21 17:31:52,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:52,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:53,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:53,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 240 transitions, 2537 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:53,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:53,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:53,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:53,592 INFO L124 PetriNetUnfolderBase]: 1989/3109 cut-off events. [2024-06-21 17:31:53,593 INFO L125 PetriNetUnfolderBase]: For 130937/130967 co-relation queries the response was YES. [2024-06-21 17:31:53,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21434 conditions, 3109 events. 1989/3109 cut-off events. For 130937/130967 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16318 event pairs, 373 based on Foata normal form. 4/3095 useless extension candidates. Maximal degree in co-relation 21341. Up to 2735 conditions per place. [2024-06-21 17:31:53,623 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 61 changer transitions 0/304 dead transitions. [2024-06-21 17:31:53,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 304 transitions, 3708 flow [2024-06-21 17:31:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:31:53,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 17:31:53,624 INFO L175 Difference]: Start difference. First operand has 198 places, 240 transitions, 2537 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:31:53,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 304 transitions, 3708 flow [2024-06-21 17:31:53,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 304 transitions, 3644 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:53,926 INFO L231 Difference]: Finished difference. Result has 206 places, 273 transitions, 3140 flow [2024-06-21 17:31:53,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3140, PETRI_PLACES=206, PETRI_TRANSITIONS=273} [2024-06-21 17:31:53,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 17:31:53,927 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 273 transitions, 3140 flow [2024-06-21 17:31:53,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:53,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:53,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:53,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:31:53,927 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:53,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash -766131037, now seen corresponding path program 2 times [2024-06-21 17:31:53,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:53,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499500001] [2024-06-21 17:31:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:53,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:54,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:54,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499500001] [2024-06-21 17:31:54,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499500001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:54,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:54,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:54,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417762836] [2024-06-21 17:31:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:54,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:54,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:54,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:54,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 273 transitions, 3140 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:54,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:54,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:54,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:55,481 INFO L124 PetriNetUnfolderBase]: 2011/3143 cut-off events. [2024-06-21 17:31:55,482 INFO L125 PetriNetUnfolderBase]: For 138189/138219 co-relation queries the response was YES. [2024-06-21 17:31:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22239 conditions, 3143 events. 2011/3143 cut-off events. For 138189/138219 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16557 event pairs, 421 based on Foata normal form. 4/3129 useless extension candidates. Maximal degree in co-relation 22141. Up to 2831 conditions per place. [2024-06-21 17:31:55,516 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 61 changer transitions 0/304 dead transitions. [2024-06-21 17:31:55,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 304 transitions, 3871 flow [2024-06-21 17:31:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:31:55,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 17:31:55,518 INFO L175 Difference]: Start difference. First operand has 206 places, 273 transitions, 3140 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:31:55,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 304 transitions, 3871 flow [2024-06-21 17:31:55,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 304 transitions, 3762 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-21 17:31:55,841 INFO L231 Difference]: Finished difference. Result has 214 places, 279 transitions, 3260 flow [2024-06-21 17:31:55,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3260, PETRI_PLACES=214, PETRI_TRANSITIONS=279} [2024-06-21 17:31:55,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 17:31:55,841 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 279 transitions, 3260 flow [2024-06-21 17:31:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:55,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:55,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:55,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:31:55,842 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:55,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -766130913, now seen corresponding path program 1 times [2024-06-21 17:31:55,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:55,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930275356] [2024-06-21 17:31:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:55,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:56,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930275356] [2024-06-21 17:31:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930275356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:56,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:56,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:56,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333890662] [2024-06-21 17:31:56,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:56,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:56,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:56,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:31:56,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 279 transitions, 3260 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:56,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:56,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:31:56,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:57,359 INFO L124 PetriNetUnfolderBase]: 2107/3264 cut-off events. [2024-06-21 17:31:57,359 INFO L125 PetriNetUnfolderBase]: For 141829/141829 co-relation queries the response was YES. [2024-06-21 17:31:57,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23006 conditions, 3264 events. 2107/3264 cut-off events. For 141829/141829 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 17090 event pairs, 415 based on Foata normal form. 2/3265 useless extension candidates. Maximal degree in co-relation 22905. Up to 3004 conditions per place. [2024-06-21 17:31:57,388 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 254 selfloop transitions, 70 changer transitions 0/328 dead transitions. [2024-06-21 17:31:57,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 328 transitions, 4442 flow [2024-06-21 17:31:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:31:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:31:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:31:57,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 17:31:57,389 INFO L175 Difference]: Start difference. First operand has 214 places, 279 transitions, 3260 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:31:57,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 328 transitions, 4442 flow [2024-06-21 17:31:57,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 328 transitions, 4302 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:57,681 INFO L231 Difference]: Finished difference. Result has 222 places, 296 transitions, 3573 flow [2024-06-21 17:31:57,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3573, PETRI_PLACES=222, PETRI_TRANSITIONS=296} [2024-06-21 17:31:57,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 17:31:57,682 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 296 transitions, 3573 flow [2024-06-21 17:31:57,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:57,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:57,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:57,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:31:57,682 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:57,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:57,683 INFO L85 PathProgramCache]: Analyzing trace with hash -763334527, now seen corresponding path program 3 times [2024-06-21 17:31:57,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:57,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189127583] [2024-06-21 17:31:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:57,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:58,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189127583] [2024-06-21 17:31:58,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189127583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:58,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:58,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:58,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836970887] [2024-06-21 17:31:58,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:58,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:58,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:58,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:58,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:31:58,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 296 transitions, 3573 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:58,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:58,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:31:58,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:59,309 INFO L124 PetriNetUnfolderBase]: 2090/3252 cut-off events. [2024-06-21 17:31:59,310 INFO L125 PetriNetUnfolderBase]: For 161517/161547 co-relation queries the response was YES. [2024-06-21 17:31:59,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23464 conditions, 3252 events. 2090/3252 cut-off events. For 161517/161547 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17136 event pairs, 430 based on Foata normal form. 14/3248 useless extension candidates. Maximal degree in co-relation 23359. Up to 2833 conditions per place. [2024-06-21 17:31:59,341 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 86 changer transitions 0/326 dead transitions. [2024-06-21 17:31:59,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 326 transitions, 4341 flow [2024-06-21 17:31:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:31:59,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:31:59,343 INFO L175 Difference]: Start difference. First operand has 222 places, 296 transitions, 3573 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:31:59,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 326 transitions, 4341 flow [2024-06-21 17:31:59,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 326 transitions, 4228 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:59,762 INFO L231 Difference]: Finished difference. Result has 227 places, 302 transitions, 3731 flow [2024-06-21 17:31:59,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3731, PETRI_PLACES=227, PETRI_TRANSITIONS=302} [2024-06-21 17:31:59,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-21 17:31:59,763 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 302 transitions, 3731 flow [2024-06-21 17:31:59,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:59,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:59,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:59,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:31:59,763 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:59,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1058419211, now seen corresponding path program 2 times [2024-06-21 17:31:59,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:59,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706888081] [2024-06-21 17:31:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:00,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:00,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706888081] [2024-06-21 17:32:00,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706888081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:00,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:00,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778328027] [2024-06-21 17:32:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:00,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:00,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:00,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 302 transitions, 3731 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:00,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:00,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:00,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:01,255 INFO L124 PetriNetUnfolderBase]: 2174/3365 cut-off events. [2024-06-21 17:32:01,255 INFO L125 PetriNetUnfolderBase]: For 155579/155579 co-relation queries the response was YES. [2024-06-21 17:32:01,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24459 conditions, 3365 events. 2174/3365 cut-off events. For 155579/155579 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17741 event pairs, 422 based on Foata normal form. 2/3366 useless extension candidates. Maximal degree in co-relation 24352. Up to 3164 conditions per place. [2024-06-21 17:32:01,289 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 265 selfloop transitions, 60 changer transitions 0/329 dead transitions. [2024-06-21 17:32:01,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 329 transitions, 4594 flow [2024-06-21 17:32:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:32:01,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:32:01,290 INFO L175 Difference]: Start difference. First operand has 227 places, 302 transitions, 3731 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:32:01,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 329 transitions, 4594 flow [2024-06-21 17:32:01,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 329 transitions, 4410 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:01,688 INFO L231 Difference]: Finished difference. Result has 230 places, 305 transitions, 3720 flow [2024-06-21 17:32:01,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3720, PETRI_PLACES=230, PETRI_TRANSITIONS=305} [2024-06-21 17:32:01,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 17:32:01,688 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 305 transitions, 3720 flow [2024-06-21 17:32:01,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:01,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:01,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:01,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:32:01,689 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:01,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1058414561, now seen corresponding path program 3 times [2024-06-21 17:32:01,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110968736] [2024-06-21 17:32:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:02,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110968736] [2024-06-21 17:32:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110968736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:02,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:02,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:02,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820395569] [2024-06-21 17:32:02,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:02,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:02,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:02,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:02,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:02,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 305 transitions, 3720 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:02,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:02,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:02,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:03,237 INFO L124 PetriNetUnfolderBase]: 2184/3379 cut-off events. [2024-06-21 17:32:03,237 INFO L125 PetriNetUnfolderBase]: For 160086/160086 co-relation queries the response was YES. [2024-06-21 17:32:03,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24411 conditions, 3379 events. 2184/3379 cut-off events. For 160086/160086 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17785 event pairs, 420 based on Foata normal form. 2/3380 useless extension candidates. Maximal degree in co-relation 24303. Up to 3169 conditions per place. [2024-06-21 17:32:03,273 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 266 selfloop transitions, 66 changer transitions 0/336 dead transitions. [2024-06-21 17:32:03,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 336 transitions, 4627 flow [2024-06-21 17:32:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:32:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:32:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:32:03,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:32:03,282 INFO L175 Difference]: Start difference. First operand has 230 places, 305 transitions, 3720 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:32:03,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 336 transitions, 4627 flow [2024-06-21 17:32:03,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 336 transitions, 4489 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:03,540 INFO L231 Difference]: Finished difference. Result has 234 places, 310 transitions, 3797 flow [2024-06-21 17:32:03,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3797, PETRI_PLACES=234, PETRI_TRANSITIONS=310} [2024-06-21 17:32:03,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-21 17:32:03,541 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 310 transitions, 3797 flow [2024-06-21 17:32:03,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:03,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:03,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:03,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:32:03,541 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:03,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash -647858659, now seen corresponding path program 1 times [2024-06-21 17:32:03,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:03,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246423166] [2024-06-21 17:32:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:03,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:04,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:04,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246423166] [2024-06-21 17:32:04,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246423166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:04,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:04,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:04,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115222039] [2024-06-21 17:32:04,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:04,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:04,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:04,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:04,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 310 transitions, 3797 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:04,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:04,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:04,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:05,082 INFO L124 PetriNetUnfolderBase]: 2192/3391 cut-off events. [2024-06-21 17:32:05,082 INFO L125 PetriNetUnfolderBase]: For 165962/165962 co-relation queries the response was YES. [2024-06-21 17:32:05,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24643 conditions, 3391 events. 2192/3391 cut-off events. For 165962/165962 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17862 event pairs, 422 based on Foata normal form. 2/3392 useless extension candidates. Maximal degree in co-relation 24533. Up to 3262 conditions per place. [2024-06-21 17:32:05,116 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 300 selfloop transitions, 26 changer transitions 0/330 dead transitions. [2024-06-21 17:32:05,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 330 transitions, 4531 flow [2024-06-21 17:32:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:32:05,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:32:05,117 INFO L175 Difference]: Start difference. First operand has 234 places, 310 transitions, 3797 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:32:05,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 330 transitions, 4531 flow [2024-06-21 17:32:05,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 330 transitions, 4432 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:05,419 INFO L231 Difference]: Finished difference. Result has 236 places, 312 transitions, 3785 flow [2024-06-21 17:32:05,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=236, PETRI_TRANSITIONS=312} [2024-06-21 17:32:05,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 17:32:05,420 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 312 transitions, 3785 flow [2024-06-21 17:32:05,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:05,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:05,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:05,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:32:05,421 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:05,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:05,421 INFO L85 PathProgramCache]: Analyzing trace with hash -647865603, now seen corresponding path program 4 times [2024-06-21 17:32:05,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:05,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219354249] [2024-06-21 17:32:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:05,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:06,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:06,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219354249] [2024-06-21 17:32:06,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219354249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:06,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:06,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:06,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018456479] [2024-06-21 17:32:06,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:06,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:06,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:06,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:06,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:06,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 312 transitions, 3785 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:06,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:06,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:06,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:07,243 INFO L124 PetriNetUnfolderBase]: 2202/3405 cut-off events. [2024-06-21 17:32:07,243 INFO L125 PetriNetUnfolderBase]: For 172277/172277 co-relation queries the response was YES. [2024-06-21 17:32:07,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24997 conditions, 3405 events. 2202/3405 cut-off events. For 172277/172277 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17982 event pairs, 423 based on Foata normal form. 2/3406 useless extension candidates. Maximal degree in co-relation 24885. Up to 3257 conditions per place. [2024-06-21 17:32:07,280 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 298 selfloop transitions, 36 changer transitions 0/338 dead transitions. [2024-06-21 17:32:07,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 338 transitions, 4576 flow [2024-06-21 17:32:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:32:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:32:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-21 17:32:07,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 17:32:07,281 INFO L175 Difference]: Start difference. First operand has 236 places, 312 transitions, 3785 flow. Second operand 11 states and 175 transitions. [2024-06-21 17:32:07,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 338 transitions, 4576 flow [2024-06-21 17:32:07,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 338 transitions, 4505 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:07,730 INFO L231 Difference]: Finished difference. Result has 241 places, 315 transitions, 3843 flow [2024-06-21 17:32:07,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3843, PETRI_PLACES=241, PETRI_TRANSITIONS=315} [2024-06-21 17:32:07,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-21 17:32:07,731 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 315 transitions, 3843 flow [2024-06-21 17:32:07,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:07,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:07,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:07,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:32:07,731 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:07,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:07,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1173705607, now seen corresponding path program 4 times [2024-06-21 17:32:07,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:07,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79588686] [2024-06-21 17:32:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:08,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:08,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79588686] [2024-06-21 17:32:08,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79588686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:08,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:08,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:08,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895547013] [2024-06-21 17:32:08,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:08,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:08,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:08,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:08,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:32:08,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 315 transitions, 3843 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:08,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:08,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:32:08,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:09,434 INFO L124 PetriNetUnfolderBase]: 2170/3376 cut-off events. [2024-06-21 17:32:09,434 INFO L125 PetriNetUnfolderBase]: For 194347/194377 co-relation queries the response was YES. [2024-06-21 17:32:09,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24919 conditions, 3376 events. 2170/3376 cut-off events. For 194347/194377 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17974 event pairs, 436 based on Foata normal form. 14/3372 useless extension candidates. Maximal degree in co-relation 24806. Up to 3021 conditions per place. [2024-06-21 17:32:09,469 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 241 selfloop transitions, 66 changer transitions 0/340 dead transitions. [2024-06-21 17:32:09,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 340 transitions, 4614 flow [2024-06-21 17:32:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:32:09,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 17:32:09,470 INFO L175 Difference]: Start difference. First operand has 241 places, 315 transitions, 3843 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:32:09,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 340 transitions, 4614 flow [2024-06-21 17:32:09,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 340 transitions, 4516 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 17:32:09,982 INFO L231 Difference]: Finished difference. Result has 241 places, 318 transitions, 3947 flow [2024-06-21 17:32:09,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3947, PETRI_PLACES=241, PETRI_TRANSITIONS=318} [2024-06-21 17:32:09,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-21 17:32:09,983 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 318 transitions, 3947 flow [2024-06-21 17:32:09,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:09,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:09,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:09,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:32:09,983 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:09,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:09,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1173705731, now seen corresponding path program 5 times [2024-06-21 17:32:09,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:09,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80312471] [2024-06-21 17:32:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:09,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:10,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80312471] [2024-06-21 17:32:10,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80312471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:10,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:10,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:10,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127923489] [2024-06-21 17:32:10,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:10,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:10,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:10,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:10,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 318 transitions, 3947 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:10,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:10,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:10,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:11,756 INFO L124 PetriNetUnfolderBase]: 2264/3499 cut-off events. [2024-06-21 17:32:11,757 INFO L125 PetriNetUnfolderBase]: For 185993/185993 co-relation queries the response was YES. [2024-06-21 17:32:11,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26045 conditions, 3499 events. 2264/3499 cut-off events. For 185993/185993 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18550 event pairs, 429 based on Foata normal form. 2/3500 useless extension candidates. Maximal degree in co-relation 25931. Up to 3338 conditions per place. [2024-06-21 17:32:11,792 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 301 selfloop transitions, 41 changer transitions 0/346 dead transitions. [2024-06-21 17:32:11,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 346 transitions, 4791 flow [2024-06-21 17:32:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:32:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:32:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 17:32:11,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-21 17:32:11,793 INFO L175 Difference]: Start difference. First operand has 241 places, 318 transitions, 3947 flow. Second operand 10 states and 166 transitions. [2024-06-21 17:32:11,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 346 transitions, 4791 flow [2024-06-21 17:32:12,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 346 transitions, 4639 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:12,273 INFO L231 Difference]: Finished difference. Result has 245 places, 323 transitions, 3978 flow [2024-06-21 17:32:12,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3978, PETRI_PLACES=245, PETRI_TRANSITIONS=323} [2024-06-21 17:32:12,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-21 17:32:12,274 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 323 transitions, 3978 flow [2024-06-21 17:32:12,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:12,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:12,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:12,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:32:12,274 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:12,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash -206386365, now seen corresponding path program 1 times [2024-06-21 17:32:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:12,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79765212] [2024-06-21 17:32:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:12,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:13,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79765212] [2024-06-21 17:32:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79765212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:13,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948743388] [2024-06-21 17:32:13,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:13,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:13,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:13,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 323 transitions, 3978 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:13,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:13,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:13,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:13,931 INFO L124 PetriNetUnfolderBase]: 2261/3495 cut-off events. [2024-06-21 17:32:13,931 INFO L125 PetriNetUnfolderBase]: For 188426/188426 co-relation queries the response was YES. [2024-06-21 17:32:13,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25941 conditions, 3495 events. 2261/3495 cut-off events. For 188426/188426 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18580 event pairs, 446 based on Foata normal form. 1/3495 useless extension candidates. Maximal degree in co-relation 25825. Up to 3382 conditions per place. [2024-06-21 17:32:13,965 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 309 selfloop transitions, 23 changer transitions 0/336 dead transitions. [2024-06-21 17:32:13,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 336 transitions, 4686 flow [2024-06-21 17:32:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:32:13,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:32:13,966 INFO L175 Difference]: Start difference. First operand has 245 places, 323 transitions, 3978 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:32:13,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 336 transitions, 4686 flow [2024-06-21 17:32:14,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 336 transitions, 4590 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:14,450 INFO L231 Difference]: Finished difference. Result has 246 places, 323 transitions, 3938 flow [2024-06-21 17:32:14,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3938, PETRI_PLACES=246, PETRI_TRANSITIONS=323} [2024-06-21 17:32:14,450 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-21 17:32:14,451 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 323 transitions, 3938 flow [2024-06-21 17:32:14,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:14,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:14,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:14,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:32:14,451 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:14,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2133287543, now seen corresponding path program 6 times [2024-06-21 17:32:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:14,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489179669] [2024-06-21 17:32:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:14,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:15,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:15,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489179669] [2024-06-21 17:32:15,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489179669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:15,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:15,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:15,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193627320] [2024-06-21 17:32:15,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:15,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:15,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:15,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:15,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:15,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:15,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 323 transitions, 3938 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:15,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:15,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:15,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:16,101 INFO L124 PetriNetUnfolderBase]: 2271/3509 cut-off events. [2024-06-21 17:32:16,101 INFO L125 PetriNetUnfolderBase]: For 196035/196035 co-relation queries the response was YES. [2024-06-21 17:32:16,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26162 conditions, 3509 events. 2271/3509 cut-off events. For 196035/196035 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18654 event pairs, 441 based on Foata normal form. 2/3510 useless extension candidates. Maximal degree in co-relation 26044. Up to 3353 conditions per place. [2024-06-21 17:32:16,139 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 309 selfloop transitions, 35 changer transitions 0/348 dead transitions. [2024-06-21 17:32:16,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 348 transitions, 4757 flow [2024-06-21 17:32:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:32:16,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:32:16,145 INFO L175 Difference]: Start difference. First operand has 246 places, 323 transitions, 3938 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:32:16,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 348 transitions, 4757 flow [2024-06-21 17:32:16,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 348 transitions, 4687 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:16,675 INFO L231 Difference]: Finished difference. Result has 249 places, 326 transitions, 4007 flow [2024-06-21 17:32:16,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4007, PETRI_PLACES=249, PETRI_TRANSITIONS=326} [2024-06-21 17:32:16,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 17:32:16,675 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 326 transitions, 4007 flow [2024-06-21 17:32:16,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:16,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:16,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:16,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:32:16,676 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:16,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash -442561477, now seen corresponding path program 2 times [2024-06-21 17:32:16,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:16,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155270105] [2024-06-21 17:32:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:16,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:17,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:17,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155270105] [2024-06-21 17:32:17,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155270105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:17,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:17,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:17,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209614119] [2024-06-21 17:32:17,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:17,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:17,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:17,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:17,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:17,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 326 transitions, 4007 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:17,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:17,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:17,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:18,228 INFO L124 PetriNetUnfolderBase]: 2279/3521 cut-off events. [2024-06-21 17:32:18,229 INFO L125 PetriNetUnfolderBase]: For 202960/202960 co-relation queries the response was YES. [2024-06-21 17:32:18,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26424 conditions, 3521 events. 2279/3521 cut-off events. For 202960/202960 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18717 event pairs, 431 based on Foata normal form. 2/3522 useless extension candidates. Maximal degree in co-relation 26304. Up to 3386 conditions per place. [2024-06-21 17:32:18,265 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 313 selfloop transitions, 28 changer transitions 0/345 dead transitions. [2024-06-21 17:32:18,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 345 transitions, 4773 flow [2024-06-21 17:32:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:32:18,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:32:18,266 INFO L175 Difference]: Start difference. First operand has 249 places, 326 transitions, 4007 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:32:18,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 345 transitions, 4773 flow [2024-06-21 17:32:18,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 345 transitions, 4665 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:18,756 INFO L231 Difference]: Finished difference. Result has 250 places, 328 transitions, 3997 flow [2024-06-21 17:32:18,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3997, PETRI_PLACES=250, PETRI_TRANSITIONS=328} [2024-06-21 17:32:18,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-21 17:32:18,757 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 328 transitions, 3997 flow [2024-06-21 17:32:18,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:18,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:18,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:18,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:32:18,757 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:18,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash -442746051, now seen corresponding path program 7 times [2024-06-21 17:32:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811674017] [2024-06-21 17:32:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:18,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:19,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:19,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811674017] [2024-06-21 17:32:19,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811674017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:19,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:19,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585236652] [2024-06-21 17:32:19,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:19,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:19,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:19,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 328 transitions, 3997 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:19,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:19,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:19,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:20,451 INFO L124 PetriNetUnfolderBase]: 2297/3546 cut-off events. [2024-06-21 17:32:20,452 INFO L125 PetriNetUnfolderBase]: For 212033/212033 co-relation queries the response was YES. [2024-06-21 17:32:20,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 3546 events. 2297/3546 cut-off events. For 212033/212033 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18853 event pairs, 440 based on Foata normal form. 2/3547 useless extension candidates. Maximal degree in co-relation 26772. Up to 3357 conditions per place. [2024-06-21 17:32:20,488 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 314 selfloop transitions, 45 changer transitions 0/363 dead transitions. [2024-06-21 17:32:20,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 363 transitions, 5055 flow [2024-06-21 17:32:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:32:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:32:20,489 INFO L175 Difference]: Start difference. First operand has 250 places, 328 transitions, 3997 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:32:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 363 transitions, 5055 flow [2024-06-21 17:32:21,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 363 transitions, 4975 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:21,033 INFO L231 Difference]: Finished difference. Result has 255 places, 335 transitions, 4174 flow [2024-06-21 17:32:21,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4174, PETRI_PLACES=255, PETRI_TRANSITIONS=335} [2024-06-21 17:32:21,034 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-21 17:32:21,034 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 335 transitions, 4174 flow [2024-06-21 17:32:21,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:21,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:21,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:21,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:32:21,034 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:21,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:21,035 INFO L85 PathProgramCache]: Analyzing trace with hash -442746175, now seen corresponding path program 5 times [2024-06-21 17:32:21,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:21,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67629346] [2024-06-21 17:32:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:21,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:21,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:21,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67629346] [2024-06-21 17:32:21,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67629346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:21,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:21,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:21,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830198384] [2024-06-21 17:32:21,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:21,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:21,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:21,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:21,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:32:21,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 335 transitions, 4174 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:21,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:21,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:32:21,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:22,782 INFO L124 PetriNetUnfolderBase]: 2234/3474 cut-off events. [2024-06-21 17:32:22,782 INFO L125 PetriNetUnfolderBase]: For 223474/223504 co-relation queries the response was YES. [2024-06-21 17:32:22,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26113 conditions, 3474 events. 2234/3474 cut-off events. For 223474/223504 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18593 event pairs, 401 based on Foata normal form. 14/3470 useless extension candidates. Maximal degree in co-relation 25990. Up to 2894 conditions per place. [2024-06-21 17:32:22,820 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 257 selfloop transitions, 71 changer transitions 0/367 dead transitions. [2024-06-21 17:32:22,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 367 transitions, 4984 flow [2024-06-21 17:32:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:32:22,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-21 17:32:22,821 INFO L175 Difference]: Start difference. First operand has 255 places, 335 transitions, 4174 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:32:22,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 367 transitions, 4984 flow [2024-06-21 17:32:23,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 367 transitions, 4867 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:23,426 INFO L231 Difference]: Finished difference. Result has 258 places, 336 transitions, 4243 flow [2024-06-21 17:32:23,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4243, PETRI_PLACES=258, PETRI_TRANSITIONS=336} [2024-06-21 17:32:23,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-21 17:32:23,426 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 336 transitions, 4243 flow [2024-06-21 17:32:23,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:23,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:23,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:32:23,427 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:23,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash -442568421, now seen corresponding path program 8 times [2024-06-21 17:32:23,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:23,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166632553] [2024-06-21 17:32:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:24,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:24,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166632553] [2024-06-21 17:32:24,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166632553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:24,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:24,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:24,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616113404] [2024-06-21 17:32:24,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:24,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:24,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:24,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:24,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:24,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 336 transitions, 4243 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:24,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:24,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:24,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:24,965 INFO L124 PetriNetUnfolderBase]: 2333/3602 cut-off events. [2024-06-21 17:32:24,965 INFO L125 PetriNetUnfolderBase]: For 213016/213016 co-relation queries the response was YES. [2024-06-21 17:32:24,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27349 conditions, 3602 events. 2333/3602 cut-off events. For 213016/213016 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19241 event pairs, 442 based on Foata normal form. 2/3603 useless extension candidates. Maximal degree in co-relation 27224. Up to 3446 conditions per place. [2024-06-21 17:32:25,003 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 321 selfloop transitions, 33 changer transitions 0/358 dead transitions. [2024-06-21 17:32:25,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 358 transitions, 5085 flow [2024-06-21 17:32:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:32:25,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:32:25,004 INFO L175 Difference]: Start difference. First operand has 258 places, 336 transitions, 4243 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:32:25,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 358 transitions, 5085 flow [2024-06-21 17:32:25,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 358 transitions, 4939 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:25,560 INFO L231 Difference]: Finished difference. Result has 260 places, 339 transitions, 4243 flow [2024-06-21 17:32:25,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4243, PETRI_PLACES=260, PETRI_TRANSITIONS=339} [2024-06-21 17:32:25,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-21 17:32:25,560 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 339 transitions, 4243 flow [2024-06-21 17:32:25,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:25,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:25,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:25,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:32:25,561 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:25,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash -206386117, now seen corresponding path program 3 times [2024-06-21 17:32:25,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:25,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40680899] [2024-06-21 17:32:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:25,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:26,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:26,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40680899] [2024-06-21 17:32:26,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40680899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:26,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:26,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:26,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708114415] [2024-06-21 17:32:26,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:26,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:26,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:26,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:26,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 339 transitions, 4243 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:26,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:26,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:26,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:27,126 INFO L124 PetriNetUnfolderBase]: 2341/3614 cut-off events. [2024-06-21 17:32:27,126 INFO L125 PetriNetUnfolderBase]: For 218445/218445 co-relation queries the response was YES. [2024-06-21 17:32:27,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27320 conditions, 3614 events. 2341/3614 cut-off events. For 218445/218445 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19246 event pairs, 456 based on Foata normal form. 2/3615 useless extension candidates. Maximal degree in co-relation 27194. Up to 3504 conditions per place. [2024-06-21 17:32:27,162 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 331 selfloop transitions, 19 changer transitions 0/354 dead transitions. [2024-06-21 17:32:27,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 354 transitions, 5013 flow [2024-06-21 17:32:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:32:27,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 17:32:27,165 INFO L175 Difference]: Start difference. First operand has 260 places, 339 transitions, 4243 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:32:27,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 354 transitions, 5013 flow [2024-06-21 17:32:27,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 354 transitions, 4907 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:27,793 INFO L231 Difference]: Finished difference. Result has 261 places, 341 transitions, 4215 flow [2024-06-21 17:32:27,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4215, PETRI_PLACES=261, PETRI_TRANSITIONS=341} [2024-06-21 17:32:27,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-21 17:32:27,794 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 341 transitions, 4215 flow [2024-06-21 17:32:27,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:27,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:27,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:27,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:32:27,794 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:27,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash -206089447, now seen corresponding path program 4 times [2024-06-21 17:32:27,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:27,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153407587] [2024-06-21 17:32:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:27,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:28,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:28,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153407587] [2024-06-21 17:32:28,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153407587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:28,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:28,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:28,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824137436] [2024-06-21 17:32:28,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:28,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:28,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:28,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:28,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:28,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 341 transitions, 4215 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:28,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:28,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:28,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:29,384 INFO L124 PetriNetUnfolderBase]: 2336/3607 cut-off events. [2024-06-21 17:32:29,384 INFO L125 PetriNetUnfolderBase]: For 221839/221839 co-relation queries the response was YES. [2024-06-21 17:32:29,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27283 conditions, 3607 events. 2336/3607 cut-off events. For 221839/221839 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19210 event pairs, 449 based on Foata normal form. 2/3608 useless extension candidates. Maximal degree in co-relation 27156. Up to 3500 conditions per place. [2024-06-21 17:32:29,420 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 337 selfloop transitions, 15 changer transitions 0/356 dead transitions. [2024-06-21 17:32:29,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 356 transitions, 4989 flow [2024-06-21 17:32:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:32:29,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:32:29,421 INFO L175 Difference]: Start difference. First operand has 261 places, 341 transitions, 4215 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:32:29,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 356 transitions, 4989 flow [2024-06-21 17:32:30,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 356 transitions, 4929 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:30,055 INFO L231 Difference]: Finished difference. Result has 263 places, 343 transitions, 4228 flow [2024-06-21 17:32:30,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4155, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4228, PETRI_PLACES=263, PETRI_TRANSITIONS=343} [2024-06-21 17:32:30,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-21 17:32:30,056 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 343 transitions, 4228 flow [2024-06-21 17:32:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:30,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:30,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:30,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:32:30,056 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:30,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:30,057 INFO L85 PathProgramCache]: Analyzing trace with hash -214667271, now seen corresponding path program 9 times [2024-06-21 17:32:30,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:30,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532319034] [2024-06-21 17:32:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532319034] [2024-06-21 17:32:30,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532319034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:30,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:30,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:30,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141355854] [2024-06-21 17:32:30,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:30,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:30,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:30,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:30,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:30,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:30,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 343 transitions, 4228 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:30,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:30,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:30,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:31,635 INFO L124 PetriNetUnfolderBase]: 2330/3599 cut-off events. [2024-06-21 17:32:31,635 INFO L125 PetriNetUnfolderBase]: For 225548/225548 co-relation queries the response was YES. [2024-06-21 17:32:31,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27262 conditions, 3599 events. 2330/3599 cut-off events. For 225548/225548 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19186 event pairs, 452 based on Foata normal form. 2/3600 useless extension candidates. Maximal degree in co-relation 27134. Up to 3487 conditions per place. [2024-06-21 17:32:31,674 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 337 selfloop transitions, 18 changer transitions 0/359 dead transitions. [2024-06-21 17:32:31,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 359 transitions, 5010 flow [2024-06-21 17:32:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:32:31,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:32:31,675 INFO L175 Difference]: Start difference. First operand has 263 places, 343 transitions, 4228 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:32:31,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 359 transitions, 5010 flow [2024-06-21 17:32:32,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 359 transitions, 4905 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:32,349 INFO L231 Difference]: Finished difference. Result has 266 places, 344 transitions, 4187 flow [2024-06-21 17:32:32,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4187, PETRI_PLACES=266, PETRI_TRANSITIONS=344} [2024-06-21 17:32:32,350 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-21 17:32:32,350 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 344 transitions, 4187 flow [2024-06-21 17:32:32,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:32,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:32,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:32,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:32:32,350 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:32,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash -158898737, now seen corresponding path program 1 times [2024-06-21 17:32:32,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:32,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8016709] [2024-06-21 17:32:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:32,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:33,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8016709] [2024-06-21 17:32:33,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8016709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:33,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:33,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:33,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445178158] [2024-06-21 17:32:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:33,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:33,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:33,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:33,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 344 transitions, 4187 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:33,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:33,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:33,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:34,141 INFO L124 PetriNetUnfolderBase]: 2335/3605 cut-off events. [2024-06-21 17:32:34,141 INFO L125 PetriNetUnfolderBase]: For 231165/231169 co-relation queries the response was YES. [2024-06-21 17:32:34,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27320 conditions, 3605 events. 2335/3605 cut-off events. For 231165/231169 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19249 event pairs, 475 based on Foata normal form. 2/3605 useless extension candidates. Maximal degree in co-relation 27191. Up to 3260 conditions per place. [2024-06-21 17:32:34,184 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 271 selfloop transitions, 93 changer transitions 0/368 dead transitions. [2024-06-21 17:32:34,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 368 transitions, 5210 flow [2024-06-21 17:32:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:32:34,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 17:32:34,185 INFO L175 Difference]: Start difference. First operand has 266 places, 344 transitions, 4187 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:32:34,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 368 transitions, 5210 flow [2024-06-21 17:32:34,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 368 transitions, 5170 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:34,791 INFO L231 Difference]: Finished difference. Result has 268 places, 350 transitions, 4479 flow [2024-06-21 17:32:34,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4479, PETRI_PLACES=268, PETRI_TRANSITIONS=350} [2024-06-21 17:32:34,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-21 17:32:34,791 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 350 transitions, 4479 flow [2024-06-21 17:32:34,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:34,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:34,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:34,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:32:34,792 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:34,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1450322309, now seen corresponding path program 2 times [2024-06-21 17:32:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:34,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640901177] [2024-06-21 17:32:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:34,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:35,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:35,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640901177] [2024-06-21 17:32:35,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640901177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:35,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:35,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:32:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095287815] [2024-06-21 17:32:35,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:35,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:32:35,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:32:35,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:32:35,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:35,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 350 transitions, 4479 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:35,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:35,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:35,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:36,631 INFO L124 PetriNetUnfolderBase]: 2345/3618 cut-off events. [2024-06-21 17:32:36,631 INFO L125 PetriNetUnfolderBase]: For 240783/240783 co-relation queries the response was YES. [2024-06-21 17:32:36,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27986 conditions, 3618 events. 2345/3618 cut-off events. For 240783/240783 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19338 event pairs, 447 based on Foata normal form. 1/3618 useless extension candidates. Maximal degree in co-relation 27856. Up to 3369 conditions per place. [2024-06-21 17:32:36,668 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 297 selfloop transitions, 73 changer transitions 0/374 dead transitions. [2024-06-21 17:32:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 374 transitions, 5399 flow [2024-06-21 17:32:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:32:36,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:32:36,669 INFO L175 Difference]: Start difference. First operand has 268 places, 350 transitions, 4479 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:32:36,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 374 transitions, 5399 flow [2024-06-21 17:32:37,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 374 transitions, 5278 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:37,385 INFO L231 Difference]: Finished difference. Result has 273 places, 358 transitions, 4648 flow [2024-06-21 17:32:37,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4648, PETRI_PLACES=273, PETRI_TRANSITIONS=358} [2024-06-21 17:32:37,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-21 17:32:37,386 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 358 transitions, 4648 flow [2024-06-21 17:32:37,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:37,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:37,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:37,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:32:37,386 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:37,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1509751413, now seen corresponding path program 1 times [2024-06-21 17:32:37,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:37,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52447507] [2024-06-21 17:32:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:37,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:38,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:38,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52447507] [2024-06-21 17:32:38,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52447507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:38,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:38,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:38,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500141537] [2024-06-21 17:32:38,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:38,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:38,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:38,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 358 transitions, 4648 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:38,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:38,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:38,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:39,144 INFO L124 PetriNetUnfolderBase]: 2379/3670 cut-off events. [2024-06-21 17:32:39,144 INFO L125 PetriNetUnfolderBase]: For 249060/249064 co-relation queries the response was YES. [2024-06-21 17:32:39,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28746 conditions, 3670 events. 2379/3670 cut-off events. For 249060/249064 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19564 event pairs, 437 based on Foata normal form. 3/3671 useless extension candidates. Maximal degree in co-relation 28614. Up to 3363 conditions per place. [2024-06-21 17:32:39,181 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 305 selfloop transitions, 77 changer transitions 0/386 dead transitions. [2024-06-21 17:32:39,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 386 transitions, 5784 flow [2024-06-21 17:32:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:32:39,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:32:39,182 INFO L175 Difference]: Start difference. First operand has 273 places, 358 transitions, 4648 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:32:39,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 386 transitions, 5784 flow [2024-06-21 17:32:39,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 386 transitions, 5606 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:39,945 INFO L231 Difference]: Finished difference. Result has 276 places, 364 transitions, 4771 flow [2024-06-21 17:32:39,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4771, PETRI_PLACES=276, PETRI_TRANSITIONS=364} [2024-06-21 17:32:39,945 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 17:32:39,945 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 364 transitions, 4771 flow [2024-06-21 17:32:39,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:39,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:39,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:39,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:32:39,946 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:39,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:39,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1182386507, now seen corresponding path program 2 times [2024-06-21 17:32:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:39,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251553353] [2024-06-21 17:32:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:39,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:40,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:40,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251553353] [2024-06-21 17:32:40,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251553353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:40,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:40,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:32:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233618868] [2024-06-21 17:32:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:40,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:32:40,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:40,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:32:40,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:32:40,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:40,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 364 transitions, 4771 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:40,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:40,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:40,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:41,672 INFO L124 PetriNetUnfolderBase]: 2389/3679 cut-off events. [2024-06-21 17:32:41,672 INFO L125 PetriNetUnfolderBase]: For 252297/252299 co-relation queries the response was YES. [2024-06-21 17:32:41,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29220 conditions, 3679 events. 2389/3679 cut-off events. For 252297/252299 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19645 event pairs, 446 based on Foata normal form. 4/3682 useless extension candidates. Maximal degree in co-relation 29088. Up to 3517 conditions per place. [2024-06-21 17:32:41,787 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 346 selfloop transitions, 32 changer transitions 0/382 dead transitions. [2024-06-21 17:32:41,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 382 transitions, 5691 flow [2024-06-21 17:32:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:32:41,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:32:41,788 INFO L175 Difference]: Start difference. First operand has 276 places, 364 transitions, 4771 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:32:41,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 382 transitions, 5691 flow [2024-06-21 17:32:42,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 5598 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:42,503 INFO L231 Difference]: Finished difference. Result has 280 places, 370 transitions, 4873 flow [2024-06-21 17:32:42,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4873, PETRI_PLACES=280, PETRI_TRANSITIONS=370} [2024-06-21 17:32:42,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-21 17:32:42,503 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 370 transitions, 4873 flow [2024-06-21 17:32:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:42,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:42,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:32:42,504 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:42,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1777693911, now seen corresponding path program 3 times [2024-06-21 17:32:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:42,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501733894] [2024-06-21 17:32:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:42,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:43,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501733894] [2024-06-21 17:32:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501733894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:43,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:32:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93097922] [2024-06-21 17:32:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:43,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:32:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:32:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:32:43,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:43,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 370 transitions, 4873 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:43,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:43,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:43,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:44,323 INFO L124 PetriNetUnfolderBase]: 2396/3698 cut-off events. [2024-06-21 17:32:44,323 INFO L125 PetriNetUnfolderBase]: For 257463/257467 co-relation queries the response was YES. [2024-06-21 17:32:44,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29613 conditions, 3698 events. 2396/3698 cut-off events. For 257463/257467 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19751 event pairs, 436 based on Foata normal form. 3/3699 useless extension candidates. Maximal degree in co-relation 29478. Up to 3445 conditions per place. [2024-06-21 17:32:44,368 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 322 selfloop transitions, 76 changer transitions 0/402 dead transitions. [2024-06-21 17:32:44,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 402 transitions, 5987 flow [2024-06-21 17:32:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:32:44,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 17:32:44,369 INFO L175 Difference]: Start difference. First operand has 280 places, 370 transitions, 4873 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:32:44,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 402 transitions, 5987 flow [2024-06-21 17:32:45,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 402 transitions, 5902 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:45,343 INFO L231 Difference]: Finished difference. Result has 285 places, 386 transitions, 5295 flow [2024-06-21 17:32:45,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4792, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5295, PETRI_PLACES=285, PETRI_TRANSITIONS=386} [2024-06-21 17:32:45,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-21 17:32:45,343 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 386 transitions, 5295 flow [2024-06-21 17:32:45,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:45,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:45,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:45,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:32:45,344 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:45,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1011694065, now seen corresponding path program 3 times [2024-06-21 17:32:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:45,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490939138] [2024-06-21 17:32:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:45,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:46,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:46,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490939138] [2024-06-21 17:32:46,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490939138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:46,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:46,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:32:46,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733432149] [2024-06-21 17:32:46,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:46,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:32:46,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:32:46,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:32:46,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:46,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 386 transitions, 5295 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:46,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:46,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:46,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:47,075 INFO L124 PetriNetUnfolderBase]: 2461/3791 cut-off events. [2024-06-21 17:32:47,075 INFO L125 PetriNetUnfolderBase]: For 259293/259293 co-relation queries the response was YES. [2024-06-21 17:32:47,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30671 conditions, 3791 events. 2461/3791 cut-off events. For 259293/259293 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20145 event pairs, 465 based on Foata normal form. 2/3792 useless extension candidates. Maximal degree in co-relation 30534. Up to 3521 conditions per place. [2024-06-21 17:32:47,121 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 368 selfloop transitions, 61 changer transitions 0/433 dead transitions. [2024-06-21 17:32:47,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 433 transitions, 6652 flow [2024-06-21 17:32:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:32:47,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:32:47,122 INFO L175 Difference]: Start difference. First operand has 285 places, 386 transitions, 5295 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:32:47,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 433 transitions, 6652 flow [2024-06-21 17:32:48,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 433 transitions, 6514 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:48,045 INFO L231 Difference]: Finished difference. Result has 292 places, 415 transitions, 5829 flow [2024-06-21 17:32:48,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5163, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5829, PETRI_PLACES=292, PETRI_TRANSITIONS=415} [2024-06-21 17:32:48,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-21 17:32:48,046 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 415 transitions, 5829 flow [2024-06-21 17:32:48,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:48,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:48,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:48,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:32:48,046 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:48,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1883796145, now seen corresponding path program 1 times [2024-06-21 17:32:48,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:48,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329513729] [2024-06-21 17:32:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:48,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:48,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:48,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329513729] [2024-06-21 17:32:48,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329513729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:48,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:48,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:48,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317110154] [2024-06-21 17:32:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:48,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:48,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:48,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 415 transitions, 5829 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:48,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:48,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:48,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:49,783 INFO L124 PetriNetUnfolderBase]: 2576/3957 cut-off events. [2024-06-21 17:32:49,783 INFO L125 PetriNetUnfolderBase]: For 281339/281341 co-relation queries the response was YES. [2024-06-21 17:32:49,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32892 conditions, 3957 events. 2576/3957 cut-off events. For 281339/281341 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21070 event pairs, 436 based on Foata normal form. 6/3962 useless extension candidates. Maximal degree in co-relation 32750. Up to 3542 conditions per place. [2024-06-21 17:32:49,833 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 360 selfloop transitions, 107 changer transitions 0/471 dead transitions. [2024-06-21 17:32:49,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 471 transitions, 7551 flow [2024-06-21 17:32:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:32:49,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:32:49,834 INFO L175 Difference]: Start difference. First operand has 292 places, 415 transitions, 5829 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:32:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 471 transitions, 7551 flow [2024-06-21 17:32:50,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 471 transitions, 7416 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:50,836 INFO L231 Difference]: Finished difference. Result has 300 places, 440 transitions, 6494 flow [2024-06-21 17:32:50,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6494, PETRI_PLACES=300, PETRI_TRANSITIONS=440} [2024-06-21 17:32:50,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-21 17:32:50,836 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 440 transitions, 6494 flow [2024-06-21 17:32:50,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:50,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:50,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:50,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:32:50,837 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:50,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1883651995, now seen corresponding path program 2 times [2024-06-21 17:32:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:50,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202200411] [2024-06-21 17:32:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:50,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:51,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:51,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202200411] [2024-06-21 17:32:51,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202200411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:51,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:51,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:51,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517510234] [2024-06-21 17:32:51,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:51,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:51,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:51,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:51,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 440 transitions, 6494 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:51,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:51,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:51,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:52,825 INFO L124 PetriNetUnfolderBase]: 2628/4029 cut-off events. [2024-06-21 17:32:52,825 INFO L125 PetriNetUnfolderBase]: For 302617/302619 co-relation queries the response was YES. [2024-06-21 17:32:52,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34625 conditions, 4029 events. 2628/4029 cut-off events. For 302617/302619 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21450 event pairs, 442 based on Foata normal form. 6/4034 useless extension candidates. Maximal degree in co-relation 34479. Up to 3726 conditions per place. [2024-06-21 17:32:52,878 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 389 selfloop transitions, 78 changer transitions 0/471 dead transitions. [2024-06-21 17:32:52,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 471 transitions, 7855 flow [2024-06-21 17:32:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:32:52,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:32:52,879 INFO L175 Difference]: Start difference. First operand has 300 places, 440 transitions, 6494 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:32:52,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 471 transitions, 7855 flow [2024-06-21 17:32:53,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 471 transitions, 7685 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:53,974 INFO L231 Difference]: Finished difference. Result has 305 places, 448 transitions, 6694 flow [2024-06-21 17:32:53,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6346, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6694, PETRI_PLACES=305, PETRI_TRANSITIONS=448} [2024-06-21 17:32:53,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-21 17:32:53,974 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 448 transitions, 6694 flow [2024-06-21 17:32:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:53,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:53,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:53,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:32:53,975 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:53,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1883646415, now seen corresponding path program 3 times [2024-06-21 17:32:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973128591] [2024-06-21 17:32:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:54,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973128591] [2024-06-21 17:32:54,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973128591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:54,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:54,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:54,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261139895] [2024-06-21 17:32:54,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:54,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:54,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:54,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:54,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:54,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:54,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 448 transitions, 6694 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:54,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:54,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:54,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:55,865 INFO L124 PetriNetUnfolderBase]: 2616/4013 cut-off events. [2024-06-21 17:32:55,866 INFO L125 PetriNetUnfolderBase]: For 293394/293396 co-relation queries the response was YES. [2024-06-21 17:32:55,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34312 conditions, 4013 events. 2616/4013 cut-off events. For 293394/293396 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21357 event pairs, 440 based on Foata normal form. 6/4018 useless extension candidates. Maximal degree in co-relation 34164. Up to 3718 conditions per place. [2024-06-21 17:32:55,915 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 387 selfloop transitions, 81 changer transitions 0/472 dead transitions. [2024-06-21 17:32:55,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 472 transitions, 7758 flow [2024-06-21 17:32:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:32:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:32:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 17:32:55,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:32:55,917 INFO L175 Difference]: Start difference. First operand has 305 places, 448 transitions, 6694 flow. Second operand 11 states and 187 transitions. [2024-06-21 17:32:55,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 472 transitions, 7758 flow [2024-06-21 17:32:57,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 472 transitions, 7616 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:57,310 INFO L231 Difference]: Finished difference. Result has 310 places, 448 transitions, 6725 flow [2024-06-21 17:32:57,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6552, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6725, PETRI_PLACES=310, PETRI_TRANSITIONS=448} [2024-06-21 17:32:57,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-21 17:32:57,310 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 448 transitions, 6725 flow [2024-06-21 17:32:57,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:57,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:57,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:57,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:32:57,310 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:57,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:57,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1592577611, now seen corresponding path program 4 times [2024-06-21 17:32:57,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:57,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944134040] [2024-06-21 17:32:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:57,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:57,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944134040] [2024-06-21 17:32:57,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944134040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:57,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:57,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:57,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283037704] [2024-06-21 17:32:57,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:57,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:57,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:58,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:32:58,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 448 transitions, 6725 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:58,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:58,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:32:58,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:58,926 INFO L124 PetriNetUnfolderBase]: 2636/4047 cut-off events. [2024-06-21 17:32:58,926 INFO L125 PetriNetUnfolderBase]: For 293915/293917 co-relation queries the response was YES. [2024-06-21 17:32:58,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34664 conditions, 4047 events. 2636/4047 cut-off events. For 293915/293917 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21645 event pairs, 466 based on Foata normal form. 6/4052 useless extension candidates. Maximal degree in co-relation 34515. Up to 3870 conditions per place. [2024-06-21 17:32:58,978 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 428 selfloop transitions, 31 changer transitions 0/463 dead transitions. [2024-06-21 17:32:58,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 463 transitions, 7770 flow [2024-06-21 17:32:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:32:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:32:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:32:58,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:32:58,979 INFO L175 Difference]: Start difference. First operand has 310 places, 448 transitions, 6725 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:32:58,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 463 transitions, 7770 flow [2024-06-21 17:33:00,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 463 transitions, 7590 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 17:33:00,288 INFO L231 Difference]: Finished difference. Result has 307 places, 451 transitions, 6693 flow [2024-06-21 17:33:00,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6693, PETRI_PLACES=307, PETRI_TRANSITIONS=451} [2024-06-21 17:33:00,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-21 17:33:00,288 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 451 transitions, 6693 flow [2024-06-21 17:33:00,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:00,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:00,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:00,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:33:00,288 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:00,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1710421811, now seen corresponding path program 5 times [2024-06-21 17:33:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:00,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910510664] [2024-06-21 17:33:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:00,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:00,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:00,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910510664] [2024-06-21 17:33:00,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910510664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:00,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728577438] [2024-06-21 17:33:00,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:01,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:01,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 451 transitions, 6693 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:01,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:01,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:01,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:02,006 INFO L124 PetriNetUnfolderBase]: 2656/4071 cut-off events. [2024-06-21 17:33:02,007 INFO L125 PetriNetUnfolderBase]: For 294214/294216 co-relation queries the response was YES. [2024-06-21 17:33:02,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34809 conditions, 4071 events. 2656/4071 cut-off events. For 294214/294216 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21727 event pairs, 464 based on Foata normal form. 6/4076 useless extension candidates. Maximal degree in co-relation 34660. Up to 3735 conditions per place. [2024-06-21 17:33:02,058 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 400 selfloop transitions, 75 changer transitions 0/479 dead transitions. [2024-06-21 17:33:02,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 479 transitions, 8021 flow [2024-06-21 17:33:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:33:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:33:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:33:02,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:33:02,059 INFO L175 Difference]: Start difference. First operand has 307 places, 451 transitions, 6693 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:33:02,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 479 transitions, 8021 flow [2024-06-21 17:33:03,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 479 transitions, 7924 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:03,225 INFO L231 Difference]: Finished difference. Result has 311 places, 456 transitions, 6907 flow [2024-06-21 17:33:03,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6596, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6907, PETRI_PLACES=311, PETRI_TRANSITIONS=456} [2024-06-21 17:33:03,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-21 17:33:03,226 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 456 transitions, 6907 flow [2024-06-21 17:33:03,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:03,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:03,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:33:03,226 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:03,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1599934841, now seen corresponding path program 6 times [2024-06-21 17:33:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:03,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674758657] [2024-06-21 17:33:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:03,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:03,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674758657] [2024-06-21 17:33:03,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674758657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:03,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:03,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:03,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854510378] [2024-06-21 17:33:03,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:03,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:03,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:03,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:03,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 456 transitions, 6907 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:03,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:03,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:03,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:04,922 INFO L124 PetriNetUnfolderBase]: 2644/4055 cut-off events. [2024-06-21 17:33:04,923 INFO L125 PetriNetUnfolderBase]: For 294063/294065 co-relation queries the response was YES. [2024-06-21 17:33:04,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34721 conditions, 4055 events. 2644/4055 cut-off events. For 294063/294065 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21665 event pairs, 454 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 34570. Up to 3727 conditions per place. [2024-06-21 17:33:04,975 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 395 selfloop transitions, 81 changer transitions 0/480 dead transitions. [2024-06-21 17:33:04,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 480 transitions, 7991 flow [2024-06-21 17:33:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:33:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:33:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:33:04,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 17:33:04,976 INFO L175 Difference]: Start difference. First operand has 311 places, 456 transitions, 6907 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:33:04,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 480 transitions, 7991 flow [2024-06-21 17:33:06,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 480 transitions, 7820 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 17:33:06,235 INFO L231 Difference]: Finished difference. Result has 315 places, 456 transitions, 6909 flow [2024-06-21 17:33:06,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6909, PETRI_PLACES=315, PETRI_TRANSITIONS=456} [2024-06-21 17:33:06,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-21 17:33:06,235 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 456 transitions, 6909 flow [2024-06-21 17:33:06,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:06,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:06,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:06,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:33:06,236 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:06,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1592310484, now seen corresponding path program 1 times [2024-06-21 17:33:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:06,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9477032] [2024-06-21 17:33:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:06,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:06,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9477032] [2024-06-21 17:33:06,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9477032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:06,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:06,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13364840] [2024-06-21 17:33:06,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:06,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:06,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:06,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:07,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:07,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 456 transitions, 6909 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:07,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:07,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:07,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:08,034 INFO L124 PetriNetUnfolderBase]: 2638/4048 cut-off events. [2024-06-21 17:33:08,034 INFO L125 PetriNetUnfolderBase]: For 285385/285385 co-relation queries the response was YES. [2024-06-21 17:33:08,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34348 conditions, 4048 events. 2638/4048 cut-off events. For 285385/285385 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21610 event pairs, 464 based on Foata normal form. 2/4049 useless extension candidates. Maximal degree in co-relation 34196. Up to 3836 conditions per place. [2024-06-21 17:33:08,086 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 412 selfloop transitions, 50 changer transitions 0/466 dead transitions. [2024-06-21 17:33:08,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 466 transitions, 7881 flow [2024-06-21 17:33:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:33:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:33:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:33:08,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-21 17:33:08,087 INFO L175 Difference]: Start difference. First operand has 315 places, 456 transitions, 6909 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:33:08,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 466 transitions, 7881 flow [2024-06-21 17:33:09,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 466 transitions, 7607 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:09,195 INFO L231 Difference]: Finished difference. Result has 313 places, 456 transitions, 6760 flow [2024-06-21 17:33:09,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6635, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6760, PETRI_PLACES=313, PETRI_TRANSITIONS=456} [2024-06-21 17:33:09,195 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-21 17:33:09,195 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 456 transitions, 6760 flow [2024-06-21 17:33:09,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:09,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:09,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:33:09,196 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1658461187, now seen corresponding path program 1 times [2024-06-21 17:33:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:09,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165706855] [2024-06-21 17:33:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:09,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:09,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165706855] [2024-06-21 17:33:09,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165706855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:09,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:09,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:09,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197112600] [2024-06-21 17:33:09,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:09,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:09,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:10,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:10,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 456 transitions, 6760 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:10,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:10,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:10,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:11,289 INFO L124 PetriNetUnfolderBase]: 2694/4140 cut-off events. [2024-06-21 17:33:11,289 INFO L125 PetriNetUnfolderBase]: For 298538/298538 co-relation queries the response was YES. [2024-06-21 17:33:11,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34496 conditions, 4140 events. 2694/4140 cut-off events. For 298538/298538 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22162 event pairs, 359 based on Foata normal form. 8/4147 useless extension candidates. Maximal degree in co-relation 34345. Up to 3771 conditions per place. [2024-06-21 17:33:11,333 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 437 selfloop transitions, 44 changer transitions 0/485 dead transitions. [2024-06-21 17:33:11,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 485 transitions, 8048 flow [2024-06-21 17:33:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:33:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:33:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:33:11,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 17:33:11,334 INFO L175 Difference]: Start difference. First operand has 313 places, 456 transitions, 6760 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:33:11,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 485 transitions, 8048 flow [2024-06-21 17:33:12,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 485 transitions, 7951 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:33:12,206 INFO L231 Difference]: Finished difference. Result has 319 places, 461 transitions, 6847 flow [2024-06-21 17:33:12,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6665, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6847, PETRI_PLACES=319, PETRI_TRANSITIONS=461} [2024-06-21 17:33:12,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-21 17:33:12,207 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 461 transitions, 6847 flow [2024-06-21 17:33:12,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:12,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:12,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:12,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:33:12,207 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:12,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1837837925, now seen corresponding path program 2 times [2024-06-21 17:33:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:12,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817703633] [2024-06-21 17:33:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:12,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:12,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:12,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817703633] [2024-06-21 17:33:12,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817703633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:12,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:12,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:33:12,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85324354] [2024-06-21 17:33:12,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:12,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:33:12,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:12,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:33:12,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:33:13,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:13,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 461 transitions, 6847 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:13,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:13,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:13,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:14,154 INFO L124 PetriNetUnfolderBase]: 2676/4114 cut-off events. [2024-06-21 17:33:14,155 INFO L125 PetriNetUnfolderBase]: For 282908/282908 co-relation queries the response was YES. [2024-06-21 17:33:14,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34096 conditions, 4114 events. 2676/4114 cut-off events. For 282908/282908 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22046 event pairs, 343 based on Foata normal form. 8/4121 useless extension candidates. Maximal degree in co-relation 33942. Up to 3763 conditions per place. [2024-06-21 17:33:14,212 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 434 selfloop transitions, 44 changer transitions 0/482 dead transitions. [2024-06-21 17:33:14,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 482 transitions, 7929 flow [2024-06-21 17:33:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:33:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:33:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:33:14,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 17:33:14,213 INFO L175 Difference]: Start difference. First operand has 319 places, 461 transitions, 6847 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:33:14,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 482 transitions, 7929 flow [2024-06-21 17:33:15,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 482 transitions, 7835 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 17:33:15,190 INFO L231 Difference]: Finished difference. Result has 322 places, 461 transitions, 6847 flow [2024-06-21 17:33:15,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6847, PETRI_PLACES=322, PETRI_TRANSITIONS=461} [2024-06-21 17:33:15,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 17:33:15,190 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 461 transitions, 6847 flow [2024-06-21 17:33:15,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:15,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:15,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:33:15,191 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:15,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1018073243, now seen corresponding path program 7 times [2024-06-21 17:33:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:15,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82699496] [2024-06-21 17:33:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:15,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82699496] [2024-06-21 17:33:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82699496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:15,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:15,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:15,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321123267] [2024-06-21 17:33:15,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:15,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:15,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:15,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:15,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 461 transitions, 6847 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:15,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:15,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:15,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:17,040 INFO L124 PetriNetUnfolderBase]: 2812/4316 cut-off events. [2024-06-21 17:33:17,041 INFO L125 PetriNetUnfolderBase]: For 303696/303698 co-relation queries the response was YES. [2024-06-21 17:33:17,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36380 conditions, 4316 events. 2812/4316 cut-off events. For 303696/303698 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23290 event pairs, 483 based on Foata normal form. 6/4321 useless extension candidates. Maximal degree in co-relation 36225. Up to 3779 conditions per place. [2024-06-21 17:33:17,099 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 394 selfloop transitions, 129 changer transitions 0/527 dead transitions. [2024-06-21 17:33:17,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 527 transitions, 8917 flow [2024-06-21 17:33:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 17:33:17,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 17:33:17,100 INFO L175 Difference]: Start difference. First operand has 322 places, 461 transitions, 6847 flow. Second operand 11 states and 193 transitions. [2024-06-21 17:33:17,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 527 transitions, 8917 flow [2024-06-21 17:33:18,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 527 transitions, 8837 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:18,421 INFO L231 Difference]: Finished difference. Result has 329 places, 490 transitions, 7615 flow [2024-06-21 17:33:18,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6771, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7615, PETRI_PLACES=329, PETRI_TRANSITIONS=490} [2024-06-21 17:33:18,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 17:33:18,422 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 490 transitions, 7615 flow [2024-06-21 17:33:18,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:18,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:18,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:18,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:33:18,422 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:18,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1646616141, now seen corresponding path program 8 times [2024-06-21 17:33:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:18,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043198469] [2024-06-21 17:33:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:18,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:19,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:19,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043198469] [2024-06-21 17:33:19,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043198469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:19,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:19,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:19,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127801656] [2024-06-21 17:33:19,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:19,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:19,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:19,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:19,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 490 transitions, 7615 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:19,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:19,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:19,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:20,365 INFO L124 PetriNetUnfolderBase]: 2874/4410 cut-off events. [2024-06-21 17:33:20,365 INFO L125 PetriNetUnfolderBase]: For 319157/319159 co-relation queries the response was YES. [2024-06-21 17:33:20,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38037 conditions, 4410 events. 2874/4410 cut-off events. For 319157/319159 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23873 event pairs, 487 based on Foata normal form. 6/4415 useless extension candidates. Maximal degree in co-relation 37881. Up to 4081 conditions per place. [2024-06-21 17:33:20,422 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 457 selfloop transitions, 71 changer transitions 0/532 dead transitions. [2024-06-21 17:33:20,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 532 transitions, 9234 flow [2024-06-21 17:33:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:33:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:33:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-21 17:33:20,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:33:20,424 INFO L175 Difference]: Start difference. First operand has 329 places, 490 transitions, 7615 flow. Second operand 12 states and 200 transitions. [2024-06-21 17:33:20,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 532 transitions, 9234 flow [2024-06-21 17:33:21,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 532 transitions, 8868 flow, removed 139 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:21,766 INFO L231 Difference]: Finished difference. Result has 337 places, 501 transitions, 7660 flow [2024-06-21 17:33:21,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7331, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7660, PETRI_PLACES=337, PETRI_TRANSITIONS=501} [2024-06-21 17:33:21,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 17:33:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 501 transitions, 7660 flow [2024-06-21 17:33:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:21,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:21,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:33:21,767 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:21,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1646610561, now seen corresponding path program 9 times [2024-06-21 17:33:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599504147] [2024-06-21 17:33:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:21,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:22,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:22,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599504147] [2024-06-21 17:33:22,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599504147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:22,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:22,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:22,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147076234] [2024-06-21 17:33:22,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:22,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:22,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:22,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:22,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 501 transitions, 7660 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:22,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:22,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:22,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:23,758 INFO L124 PetriNetUnfolderBase]: 2862/4394 cut-off events. [2024-06-21 17:33:23,758 INFO L125 PetriNetUnfolderBase]: For 313889/313891 co-relation queries the response was YES. [2024-06-21 17:33:23,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37116 conditions, 4394 events. 2862/4394 cut-off events. For 313889/313891 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23821 event pairs, 485 based on Foata normal form. 6/4399 useless extension candidates. Maximal degree in co-relation 36960. Up to 4073 conditions per place. [2024-06-21 17:33:23,814 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 455 selfloop transitions, 71 changer transitions 0/530 dead transitions. [2024-06-21 17:33:23,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 530 transitions, 8897 flow [2024-06-21 17:33:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 17:33:23,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-21 17:33:23,815 INFO L175 Difference]: Start difference. First operand has 337 places, 501 transitions, 7660 flow. Second operand 11 states and 186 transitions. [2024-06-21 17:33:23,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 530 transitions, 8897 flow [2024-06-21 17:33:25,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 530 transitions, 8764 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:25,079 INFO L231 Difference]: Finished difference. Result has 340 places, 501 transitions, 7676 flow [2024-06-21 17:33:25,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7527, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7676, PETRI_PLACES=340, PETRI_TRANSITIONS=501} [2024-06-21 17:33:25,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-21 17:33:25,080 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 501 transitions, 7676 flow [2024-06-21 17:33:25,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:25,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:25,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:25,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:33:25,080 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:25,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:25,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1903429149, now seen corresponding path program 10 times [2024-06-21 17:33:25,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:25,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623024568] [2024-06-21 17:33:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:25,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:25,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:25,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623024568] [2024-06-21 17:33:25,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623024568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:25,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:25,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:25,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705822724] [2024-06-21 17:33:25,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:25,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:25,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:25,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:25,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 501 transitions, 7676 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:25,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:25,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:25,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:27,077 INFO L124 PetriNetUnfolderBase]: 2892/4432 cut-off events. [2024-06-21 17:33:27,077 INFO L125 PetriNetUnfolderBase]: For 313894/313896 co-relation queries the response was YES. [2024-06-21 17:33:27,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37484 conditions, 4432 events. 2892/4432 cut-off events. For 313894/313896 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23986 event pairs, 489 based on Foata normal form. 6/4437 useless extension candidates. Maximal degree in co-relation 37327. Up to 3983 conditions per place. [2024-06-21 17:33:27,130 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 402 selfloop transitions, 133 changer transitions 0/539 dead transitions. [2024-06-21 17:33:27,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 539 transitions, 9147 flow [2024-06-21 17:33:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:33:27,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:33:27,131 INFO L175 Difference]: Start difference. First operand has 340 places, 501 transitions, 7676 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:33:27,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 539 transitions, 9147 flow [2024-06-21 17:33:28,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 539 transitions, 9005 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 17:33:28,404 INFO L231 Difference]: Finished difference. Result has 340 places, 509 transitions, 7921 flow [2024-06-21 17:33:28,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7534, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7921, PETRI_PLACES=340, PETRI_TRANSITIONS=509} [2024-06-21 17:33:28,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-21 17:33:28,404 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 509 transitions, 7921 flow [2024-06-21 17:33:28,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:28,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:28,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:28,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:33:28,405 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:28,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2106573861, now seen corresponding path program 11 times [2024-06-21 17:33:28,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:28,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904032466] [2024-06-21 17:33:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:29,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:29,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904032466] [2024-06-21 17:33:29,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904032466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:29,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:29,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:29,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799163399] [2024-06-21 17:33:29,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:29,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:29,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:29,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:29,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:29,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:29,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 509 transitions, 7921 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:29,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:29,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:29,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:30,187 INFO L124 PetriNetUnfolderBase]: 2968/4543 cut-off events. [2024-06-21 17:33:30,188 INFO L125 PetriNetUnfolderBase]: For 341603/341605 co-relation queries the response was YES. [2024-06-21 17:33:30,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39194 conditions, 4543 events. 2968/4543 cut-off events. For 341603/341605 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24635 event pairs, 468 based on Foata normal form. 6/4548 useless extension candidates. Maximal degree in co-relation 39036. Up to 3551 conditions per place. [2024-06-21 17:33:30,254 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 333 selfloop transitions, 209 changer transitions 0/546 dead transitions. [2024-06-21 17:33:30,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 546 transitions, 9658 flow [2024-06-21 17:33:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:33:30,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:33:30,255 INFO L175 Difference]: Start difference. First operand has 340 places, 509 transitions, 7921 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:33:30,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 546 transitions, 9658 flow [2024-06-21 17:33:31,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 546 transitions, 9264 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:31,831 INFO L231 Difference]: Finished difference. Result has 341 places, 518 transitions, 8159 flow [2024-06-21 17:33:31,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7537, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8159, PETRI_PLACES=341, PETRI_TRANSITIONS=518} [2024-06-21 17:33:31,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 17:33:31,832 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 518 transitions, 8159 flow [2024-06-21 17:33:31,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:31,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:31,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:31,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:33:31,833 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:31,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:31,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2106158151, now seen corresponding path program 12 times [2024-06-21 17:33:31,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:31,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456019411] [2024-06-21 17:33:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:31,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:32,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456019411] [2024-06-21 17:33:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456019411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:32,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:32,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:32,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041336283] [2024-06-21 17:33:32,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:32,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:32,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:32,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:32,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 518 transitions, 8159 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:32,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:32,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:32,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:33,655 INFO L124 PetriNetUnfolderBase]: 2956/4531 cut-off events. [2024-06-21 17:33:33,655 INFO L125 PetriNetUnfolderBase]: For 343405/343407 co-relation queries the response was YES. [2024-06-21 17:33:33,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39270 conditions, 4531 events. 2956/4531 cut-off events. For 343405/343407 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 24631 event pairs, 510 based on Foata normal form. 6/4536 useless extension candidates. Maximal degree in co-relation 39113. Up to 4104 conditions per place. [2024-06-21 17:33:33,717 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 400 selfloop transitions, 135 changer transitions 0/539 dead transitions. [2024-06-21 17:33:33,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 539 transitions, 9319 flow [2024-06-21 17:33:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:33:33,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:33:33,718 INFO L175 Difference]: Start difference. First operand has 341 places, 518 transitions, 8159 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:33:33,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 539 transitions, 9319 flow [2024-06-21 17:33:35,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 539 transitions, 9081 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 17:33:35,563 INFO L231 Difference]: Finished difference. Result has 346 places, 518 transitions, 8198 flow [2024-06-21 17:33:35,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7921, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8198, PETRI_PLACES=346, PETRI_TRANSITIONS=518} [2024-06-21 17:33:35,563 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 17:33:35,563 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 518 transitions, 8198 flow [2024-06-21 17:33:35,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:35,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:35,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:35,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:33:35,564 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:35,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2024860161, now seen corresponding path program 13 times [2024-06-21 17:33:35,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:35,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438450008] [2024-06-21 17:33:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:36,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:36,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438450008] [2024-06-21 17:33:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438450008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:36,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:36,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:36,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097304571] [2024-06-21 17:33:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:36,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:36,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 518 transitions, 8198 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:36,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:36,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:36,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:37,672 INFO L124 PetriNetUnfolderBase]: 2976/4559 cut-off events. [2024-06-21 17:33:37,672 INFO L125 PetriNetUnfolderBase]: For 344418/344420 co-relation queries the response was YES. [2024-06-21 17:33:37,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39080 conditions, 4559 events. 2976/4559 cut-off events. For 344418/344420 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 24815 event pairs, 515 based on Foata normal form. 6/4564 useless extension candidates. Maximal degree in co-relation 38921. Up to 4275 conditions per place. [2024-06-21 17:33:37,731 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 457 selfloop transitions, 78 changer transitions 0/539 dead transitions. [2024-06-21 17:33:37,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 539 transitions, 9396 flow [2024-06-21 17:33:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:33:37,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 17:33:37,733 INFO L175 Difference]: Start difference. First operand has 346 places, 518 transitions, 8198 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:33:37,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 539 transitions, 9396 flow [2024-06-21 17:33:39,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 539 transitions, 9082 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:33:39,616 INFO L231 Difference]: Finished difference. Result has 347 places, 521 transitions, 8099 flow [2024-06-21 17:33:39,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7884, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8099, PETRI_PLACES=347, PETRI_TRANSITIONS=521} [2024-06-21 17:33:39,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-21 17:33:39,617 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 521 transitions, 8099 flow [2024-06-21 17:33:39,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:39,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:39,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:39,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:33:39,617 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:39,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash -698487113, now seen corresponding path program 14 times [2024-06-21 17:33:39,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:39,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465430314] [2024-06-21 17:33:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:39,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:40,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465430314] [2024-06-21 17:33:40,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465430314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:40,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:40,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:40,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81163315] [2024-06-21 17:33:40,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:40,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:40,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:40,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:40,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:40,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 521 transitions, 8099 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:40,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:40,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:40,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:41,568 INFO L124 PetriNetUnfolderBase]: 3060/4679 cut-off events. [2024-06-21 17:33:41,568 INFO L125 PetriNetUnfolderBase]: For 375063/375065 co-relation queries the response was YES. [2024-06-21 17:33:41,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40668 conditions, 4679 events. 3060/4679 cut-off events. For 375063/375065 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 25485 event pairs, 472 based on Foata normal form. 6/4684 useless extension candidates. Maximal degree in co-relation 40508. Up to 4042 conditions per place. [2024-06-21 17:33:41,634 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 411 selfloop transitions, 148 changer transitions 0/563 dead transitions. [2024-06-21 17:33:41,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 563 transitions, 9943 flow [2024-06-21 17:33:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:33:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:33:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-21 17:33:41,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 17:33:41,635 INFO L175 Difference]: Start difference. First operand has 347 places, 521 transitions, 8099 flow. Second operand 12 states and 205 transitions. [2024-06-21 17:33:41,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 563 transitions, 9943 flow [2024-06-21 17:33:43,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 563 transitions, 9768 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:33:43,685 INFO L231 Difference]: Finished difference. Result has 354 places, 530 transitions, 8472 flow [2024-06-21 17:33:43,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7924, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8472, PETRI_PLACES=354, PETRI_TRANSITIONS=530} [2024-06-21 17:33:43,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-21 17:33:43,686 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 530 transitions, 8472 flow [2024-06-21 17:33:43,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:43,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:43,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:43,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:33:43,686 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:43,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1385632835, now seen corresponding path program 15 times [2024-06-21 17:33:43,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:43,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330950252] [2024-06-21 17:33:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:43,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:44,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:44,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330950252] [2024-06-21 17:33:44,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330950252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:44,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:44,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:44,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844139719] [2024-06-21 17:33:44,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:44,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:44,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:44,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:44,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:44,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 530 transitions, 8472 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:44,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:44,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:44,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:45,602 INFO L124 PetriNetUnfolderBase]: 3112/4755 cut-off events. [2024-06-21 17:33:45,602 INFO L125 PetriNetUnfolderBase]: For 397833/397835 co-relation queries the response was YES. [2024-06-21 17:33:45,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42231 conditions, 4755 events. 3112/4755 cut-off events. For 397833/397835 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26040 event pairs, 476 based on Foata normal form. 6/4760 useless extension candidates. Maximal degree in co-relation 42069. Up to 4082 conditions per place. [2024-06-21 17:33:45,674 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 415 selfloop transitions, 145 changer transitions 0/564 dead transitions. [2024-06-21 17:33:45,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 564 transitions, 10229 flow [2024-06-21 17:33:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:33:45,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 17:33:45,675 INFO L175 Difference]: Start difference. First operand has 354 places, 530 transitions, 8472 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:33:45,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 564 transitions, 10229 flow [2024-06-21 17:33:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 564 transitions, 9961 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:47,848 INFO L231 Difference]: Finished difference. Result has 356 places, 536 transitions, 8639 flow [2024-06-21 17:33:47,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8639, PETRI_PLACES=356, PETRI_TRANSITIONS=536} [2024-06-21 17:33:47,848 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-21 17:33:47,848 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 536 transitions, 8639 flow [2024-06-21 17:33:47,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:47,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:47,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:47,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:33:47,849 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:47,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:47,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1723914407, now seen corresponding path program 16 times [2024-06-21 17:33:47,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:47,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619141463] [2024-06-21 17:33:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:47,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:48,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:48,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619141463] [2024-06-21 17:33:48,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619141463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:48,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:48,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642729494] [2024-06-21 17:33:48,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:48,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:48,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:48,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:48,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:48,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 536 transitions, 8639 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:48,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:48,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:48,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:50,040 INFO L124 PetriNetUnfolderBase]: 3100/4745 cut-off events. [2024-06-21 17:33:50,040 INFO L125 PetriNetUnfolderBase]: For 394599/394601 co-relation queries the response was YES. [2024-06-21 17:33:50,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42045 conditions, 4745 events. 3100/4745 cut-off events. For 394599/394601 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25998 event pairs, 535 based on Foata normal form. 6/4750 useless extension candidates. Maximal degree in co-relation 41881. Up to 4387 conditions per place. [2024-06-21 17:33:50,111 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 473 selfloop transitions, 88 changer transitions 0/565 dead transitions. [2024-06-21 17:33:50,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 565 transitions, 10080 flow [2024-06-21 17:33:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:33:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:33:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-21 17:33:50,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-06-21 17:33:50,112 INFO L175 Difference]: Start difference. First operand has 356 places, 536 transitions, 8639 flow. Second operand 13 states and 212 transitions. [2024-06-21 17:33:50,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 565 transitions, 10080 flow [2024-06-21 17:33:52,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 565 transitions, 9818 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:52,743 INFO L231 Difference]: Finished difference. Result has 364 places, 536 transitions, 8560 flow [2024-06-21 17:33:52,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8377, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8560, PETRI_PLACES=364, PETRI_TRANSITIONS=536} [2024-06-21 17:33:52,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-21 17:33:52,744 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 536 transitions, 8560 flow [2024-06-21 17:33:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:52,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:52,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:52,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:33:52,744 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:52,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1377871055, now seen corresponding path program 17 times [2024-06-21 17:33:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:52,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557434307] [2024-06-21 17:33:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:52,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:53,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:53,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557434307] [2024-06-21 17:33:53,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557434307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:53,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:53,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:53,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597242294] [2024-06-21 17:33:53,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:53,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:53,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:53,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:53,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:53,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 536 transitions, 8560 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:53,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:53,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:53,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:54,863 INFO L124 PetriNetUnfolderBase]: 3088/4731 cut-off events. [2024-06-21 17:33:54,863 INFO L125 PetriNetUnfolderBase]: For 391177/391179 co-relation queries the response was YES. [2024-06-21 17:33:54,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41419 conditions, 4731 events. 3088/4731 cut-off events. For 391177/391179 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25935 event pairs, 535 based on Foata normal form. 6/4736 useless extension candidates. Maximal degree in co-relation 41254. Up to 4379 conditions per place. [2024-06-21 17:33:54,929 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 467 selfloop transitions, 88 changer transitions 0/559 dead transitions. [2024-06-21 17:33:54,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 559 transitions, 9796 flow [2024-06-21 17:33:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-21 17:33:54,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-21 17:33:54,929 INFO L175 Difference]: Start difference. First operand has 364 places, 536 transitions, 8560 flow. Second operand 11 states and 182 transitions. [2024-06-21 17:33:54,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 559 transitions, 9796 flow [2024-06-21 17:33:57,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 559 transitions, 9525 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-21 17:33:57,262 INFO L231 Difference]: Finished difference. Result has 364 places, 536 transitions, 8471 flow [2024-06-21 17:33:57,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8289, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8471, PETRI_PLACES=364, PETRI_TRANSITIONS=536} [2024-06-21 17:33:57,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-21 17:33:57,262 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 536 transitions, 8471 flow [2024-06-21 17:33:57,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:57,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:57,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:57,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:33:57,263 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:57,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:57,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1390995215, now seen corresponding path program 18 times [2024-06-21 17:33:57,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:57,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550290293] [2024-06-21 17:33:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:57,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:57,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550290293] [2024-06-21 17:33:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550290293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:57,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:57,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372011560] [2024-06-21 17:33:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:58,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:33:58,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 536 transitions, 8471 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:58,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:58,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:33:58,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:59,240 INFO L124 PetriNetUnfolderBase]: 3076/4707 cut-off events. [2024-06-21 17:33:59,240 INFO L125 PetriNetUnfolderBase]: For 388635/388637 co-relation queries the response was YES. [2024-06-21 17:33:59,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40978 conditions, 4707 events. 3076/4707 cut-off events. For 388635/388637 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25771 event pairs, 476 based on Foata normal form. 6/4712 useless extension candidates. Maximal degree in co-relation 40813. Up to 4058 conditions per place. [2024-06-21 17:33:59,310 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 408 selfloop transitions, 152 changer transitions 0/564 dead transitions. [2024-06-21 17:33:59,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 564 transitions, 9797 flow [2024-06-21 17:33:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 17:33:59,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-21 17:33:59,311 INFO L175 Difference]: Start difference. First operand has 364 places, 536 transitions, 8471 flow. Second operand 11 states and 189 transitions. [2024-06-21 17:33:59,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 564 transitions, 9797 flow [2024-06-21 17:34:01,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 564 transitions, 9595 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 17:34:01,498 INFO L231 Difference]: Finished difference. Result has 365 places, 536 transitions, 8579 flow [2024-06-21 17:34:01,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8269, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8579, PETRI_PLACES=365, PETRI_TRANSITIONS=536} [2024-06-21 17:34:01,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 17:34:01,499 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 536 transitions, 8579 flow [2024-06-21 17:34:01,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:01,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:01,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:01,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:34:01,499 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:01,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash -847856475, now seen corresponding path program 19 times [2024-06-21 17:34:01,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:01,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178134054] [2024-06-21 17:34:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:02,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:02,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178134054] [2024-06-21 17:34:02,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178134054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:02,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:02,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:02,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086417009] [2024-06-21 17:34:02,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:02,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:02,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:02,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:02,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:02,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 536 transitions, 8579 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:02,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:02,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:02,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:03,643 INFO L124 PetriNetUnfolderBase]: 3096/4737 cut-off events. [2024-06-21 17:34:03,644 INFO L125 PetriNetUnfolderBase]: For 399400/399402 co-relation queries the response was YES. [2024-06-21 17:34:03,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41576 conditions, 4737 events. 3096/4737 cut-off events. For 399400/399402 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 26001 event pairs, 529 based on Foata normal form. 6/4742 useless extension candidates. Maximal degree in co-relation 41410. Up to 4327 conditions per place. [2024-06-21 17:34:03,710 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 485 selfloop transitions, 83 changer transitions 0/572 dead transitions. [2024-06-21 17:34:03,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 572 transitions, 10265 flow [2024-06-21 17:34:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 17:34:03,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-21 17:34:03,713 INFO L175 Difference]: Start difference. First operand has 365 places, 536 transitions, 8579 flow. Second operand 10 states and 179 transitions. [2024-06-21 17:34:03,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 572 transitions, 10265 flow [2024-06-21 17:34:06,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 572 transitions, 9905 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 17:34:06,054 INFO L231 Difference]: Finished difference. Result has 364 places, 539 transitions, 8450 flow [2024-06-21 17:34:06,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8219, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8450, PETRI_PLACES=364, PETRI_TRANSITIONS=539} [2024-06-21 17:34:06,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-21 17:34:06,055 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 539 transitions, 8450 flow [2024-06-21 17:34:06,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:06,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:06,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:06,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:34:06,056 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:06,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:06,056 INFO L85 PathProgramCache]: Analyzing trace with hash -847850895, now seen corresponding path program 20 times [2024-06-21 17:34:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:06,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330439831] [2024-06-21 17:34:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:06,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:06,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330439831] [2024-06-21 17:34:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330439831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:06,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:06,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:06,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384208324] [2024-06-21 17:34:06,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:06,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:06,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:06,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:06,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:06,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 539 transitions, 8450 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:06,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:06,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:06,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:08,114 INFO L124 PetriNetUnfolderBase]: 3084/4725 cut-off events. [2024-06-21 17:34:08,114 INFO L125 PetriNetUnfolderBase]: For 395640/395642 co-relation queries the response was YES. [2024-06-21 17:34:08,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40977 conditions, 4725 events. 3084/4725 cut-off events. For 395640/395642 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 25935 event pairs, 527 based on Foata normal form. 6/4730 useless extension candidates. Maximal degree in co-relation 40810. Up to 4319 conditions per place. [2024-06-21 17:34:08,176 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 479 selfloop transitions, 79 changer transitions 0/562 dead transitions. [2024-06-21 17:34:08,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 562 transitions, 9843 flow [2024-06-21 17:34:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:34:08,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:34:08,177 INFO L175 Difference]: Start difference. First operand has 364 places, 539 transitions, 8450 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:34:08,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 562 transitions, 9843 flow [2024-06-21 17:34:10,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 562 transitions, 9451 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 17:34:10,301 INFO L231 Difference]: Finished difference. Result has 363 places, 539 transitions, 8222 flow [2024-06-21 17:34:10,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8058, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8222, PETRI_PLACES=363, PETRI_TRANSITIONS=539} [2024-06-21 17:34:10,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-21 17:34:10,302 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 539 transitions, 8222 flow [2024-06-21 17:34:10,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:10,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:10,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:10,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:34:10,302 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:10,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash -840504825, now seen corresponding path program 21 times [2024-06-21 17:34:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:10,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637454372] [2024-06-21 17:34:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:10,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637454372] [2024-06-21 17:34:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637454372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:10,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:10,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:10,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54494388] [2024-06-21 17:34:10,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:10,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:10,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:10,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:11,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:11,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 539 transitions, 8222 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:11,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:11,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:12,353 INFO L124 PetriNetUnfolderBase]: 3072/4707 cut-off events. [2024-06-21 17:34:12,353 INFO L125 PetriNetUnfolderBase]: For 390619/390621 co-relation queries the response was YES. [2024-06-21 17:34:12,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40136 conditions, 4707 events. 3072/4707 cut-off events. For 390619/390621 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 25783 event pairs, 519 based on Foata normal form. 6/4712 useless extension candidates. Maximal degree in co-relation 39970. Up to 4363 conditions per place. [2024-06-21 17:34:12,415 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 479 selfloop transitions, 79 changer transitions 0/562 dead transitions. [2024-06-21 17:34:12,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 562 transitions, 9435 flow [2024-06-21 17:34:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:34:12,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:34:12,416 INFO L175 Difference]: Start difference. First operand has 363 places, 539 transitions, 8222 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:34:12,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 562 transitions, 9435 flow [2024-06-21 17:34:14,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 562 transitions, 9276 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:14,898 INFO L231 Difference]: Finished difference. Result has 365 places, 539 transitions, 8228 flow [2024-06-21 17:34:14,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8063, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8228, PETRI_PLACES=365, PETRI_TRANSITIONS=539} [2024-06-21 17:34:14,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 17:34:14,898 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 539 transitions, 8228 flow [2024-06-21 17:34:14,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:14,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:14,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:14,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:34:14,899 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:14,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash -834726735, now seen corresponding path program 22 times [2024-06-21 17:34:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:14,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930716046] [2024-06-21 17:34:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:14,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:15,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:15,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930716046] [2024-06-21 17:34:15,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930716046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:15,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:15,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:15,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959611895] [2024-06-21 17:34:15,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:15,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:15,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:15,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 539 transitions, 8228 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:15,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:15,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:15,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:16,888 INFO L124 PetriNetUnfolderBase]: 3156/4827 cut-off events. [2024-06-21 17:34:16,889 INFO L125 PetriNetUnfolderBase]: For 428452/428454 co-relation queries the response was YES. [2024-06-21 17:34:16,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42014 conditions, 4827 events. 3156/4827 cut-off events. For 428452/428454 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26586 event pairs, 520 based on Foata normal form. 6/4832 useless extension candidates. Maximal degree in co-relation 41847. Up to 4144 conditions per place. [2024-06-21 17:34:16,949 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 440 selfloop transitions, 129 changer transitions 0/573 dead transitions. [2024-06-21 17:34:16,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 573 transitions, 10247 flow [2024-06-21 17:34:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:34:16,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 17:34:16,950 INFO L175 Difference]: Start difference. First operand has 365 places, 539 transitions, 8228 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:34:16,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 573 transitions, 10247 flow [2024-06-21 17:34:18,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 573 transitions, 9986 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:34:18,870 INFO L231 Difference]: Finished difference. Result has 365 places, 548 transitions, 8465 flow [2024-06-21 17:34:18,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8465, PETRI_PLACES=365, PETRI_TRANSITIONS=548} [2024-06-21 17:34:18,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 17:34:18,871 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 548 transitions, 8465 flow [2024-06-21 17:34:18,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:18,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:18,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:18,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:34:18,871 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:18,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash -834963885, now seen corresponding path program 23 times [2024-06-21 17:34:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:18,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883383979] [2024-06-21 17:34:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:19,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883383979] [2024-06-21 17:34:19,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883383979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:19,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:19,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031141578] [2024-06-21 17:34:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:19,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:19,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:19,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:19,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 548 transitions, 8465 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:19,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:19,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:19,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:20,953 INFO L124 PetriNetUnfolderBase]: 3144/4811 cut-off events. [2024-06-21 17:34:20,953 INFO L125 PetriNetUnfolderBase]: For 425682/425684 co-relation queries the response was YES. [2024-06-21 17:34:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41841 conditions, 4811 events. 3144/4811 cut-off events. For 425682/425684 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26509 event pairs, 526 based on Foata normal form. 6/4816 useless extension candidates. Maximal degree in co-relation 41673. Up to 4136 conditions per place. [2024-06-21 17:34:21,017 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 441 selfloop transitions, 127 changer transitions 0/572 dead transitions. [2024-06-21 17:34:21,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 572 transitions, 10090 flow [2024-06-21 17:34:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:34:21,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 17:34:21,018 INFO L175 Difference]: Start difference. First operand has 365 places, 548 transitions, 8465 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:34:21,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 572 transitions, 10090 flow [2024-06-21 17:34:23,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 572 transitions, 9849 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-21 17:34:23,799 INFO L231 Difference]: Finished difference. Result has 370 places, 548 transitions, 8484 flow [2024-06-21 17:34:23,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8224, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8484, PETRI_PLACES=370, PETRI_TRANSITIONS=548} [2024-06-21 17:34:23,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-21 17:34:23,800 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 548 transitions, 8484 flow [2024-06-21 17:34:23,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:23,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:23,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:23,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:34:23,800 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:23,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:23,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1757880606, now seen corresponding path program 2 times [2024-06-21 17:34:23,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:23,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634664332] [2024-06-21 17:34:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:23,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:24,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634664332] [2024-06-21 17:34:24,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634664332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:24,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:24,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:24,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133787353] [2024-06-21 17:34:24,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:24,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:24,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:24,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:24,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 548 transitions, 8484 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:24,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:24,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:24,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:25,837 INFO L124 PetriNetUnfolderBase]: 3154/4819 cut-off events. [2024-06-21 17:34:25,837 INFO L125 PetriNetUnfolderBase]: For 428420/428422 co-relation queries the response was YES. [2024-06-21 17:34:25,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41847 conditions, 4819 events. 3154/4819 cut-off events. For 428420/428422 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26495 event pairs, 541 based on Foata normal form. 4/4822 useless extension candidates. Maximal degree in co-relation 41678. Up to 4619 conditions per place. [2024-06-21 17:34:25,894 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 531 selfloop transitions, 32 changer transitions 0/567 dead transitions. [2024-06-21 17:34:25,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 567 transitions, 9797 flow [2024-06-21 17:34:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:34:25,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:34:25,900 INFO L175 Difference]: Start difference. First operand has 370 places, 548 transitions, 8484 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:34:25,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 567 transitions, 9797 flow [2024-06-21 17:34:28,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 567 transitions, 9502 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:28,281 INFO L231 Difference]: Finished difference. Result has 373 places, 556 transitions, 8433 flow [2024-06-21 17:34:28,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8189, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8433, PETRI_PLACES=373, PETRI_TRANSITIONS=556} [2024-06-21 17:34:28,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 17:34:28,282 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 556 transitions, 8433 flow [2024-06-21 17:34:28,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:28,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:28,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:28,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:34:28,282 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:28,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash -840089115, now seen corresponding path program 24 times [2024-06-21 17:34:28,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:28,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139533457] [2024-06-21 17:34:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:28,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:28,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:28,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139533457] [2024-06-21 17:34:28,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139533457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:28,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:28,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752331879] [2024-06-21 17:34:28,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:28,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:28,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:29,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:29,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 556 transitions, 8433 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:29,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:29,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:29,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:30,358 INFO L124 PetriNetUnfolderBase]: 3142/4805 cut-off events. [2024-06-21 17:34:30,358 INFO L125 PetriNetUnfolderBase]: For 430482/430484 co-relation queries the response was YES. [2024-06-21 17:34:30,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41525 conditions, 4805 events. 3142/4805 cut-off events. For 430482/430484 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26449 event pairs, 498 based on Foata normal form. 6/4810 useless extension candidates. Maximal degree in co-relation 41353. Up to 4142 conditions per place. [2024-06-21 17:34:30,420 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 439 selfloop transitions, 139 changer transitions 0/582 dead transitions. [2024-06-21 17:34:30,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 582 transitions, 9934 flow [2024-06-21 17:34:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:34:30,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-21 17:34:30,421 INFO L175 Difference]: Start difference. First operand has 373 places, 556 transitions, 8433 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:34:30,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 582 transitions, 9934 flow [2024-06-21 17:34:32,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 582 transitions, 9789 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 17:34:32,509 INFO L231 Difference]: Finished difference. Result has 377 places, 556 transitions, 8574 flow [2024-06-21 17:34:32,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8290, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8574, PETRI_PLACES=377, PETRI_TRANSITIONS=556} [2024-06-21 17:34:32,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 17:34:32,510 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 556 transitions, 8574 flow [2024-06-21 17:34:32,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:32,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:32,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:32,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:34:32,510 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:32,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1935241619, now seen corresponding path program 25 times [2024-06-21 17:34:32,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:32,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195562072] [2024-06-21 17:34:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:32,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:33,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195562072] [2024-06-21 17:34:33,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195562072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:33,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:33,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:33,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071938891] [2024-06-21 17:34:33,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:33,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:33,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:33,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:33,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:33,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 556 transitions, 8574 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:33,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:33,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:33,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:34,462 INFO L124 PetriNetUnfolderBase]: 3162/4835 cut-off events. [2024-06-21 17:34:34,463 INFO L125 PetriNetUnfolderBase]: For 433250/433252 co-relation queries the response was YES. [2024-06-21 17:34:34,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42124 conditions, 4835 events. 3162/4835 cut-off events. For 433250/433252 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 26624 event pairs, 514 based on Foata normal form. 6/4840 useless extension candidates. Maximal degree in co-relation 41952. Up to 4532 conditions per place. [2024-06-21 17:34:34,655 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 528 selfloop transitions, 44 changer transitions 0/576 dead transitions. [2024-06-21 17:34:34,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 576 transitions, 10093 flow [2024-06-21 17:34:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:34:34,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:34:34,656 INFO L175 Difference]: Start difference. First operand has 377 places, 556 transitions, 8574 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:34:34,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 576 transitions, 10093 flow [2024-06-21 17:34:36,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 576 transitions, 9617 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:34:36,522 INFO L231 Difference]: Finished difference. Result has 378 places, 559 transitions, 8279 flow [2024-06-21 17:34:36,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8279, PETRI_PLACES=378, PETRI_TRANSITIONS=559} [2024-06-21 17:34:36,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 17:34:36,523 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 559 transitions, 8279 flow [2024-06-21 17:34:36,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:36,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:36,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:36,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:34:36,523 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:36,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2103016630, now seen corresponding path program 3 times [2024-06-21 17:34:36,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:36,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948516629] [2024-06-21 17:34:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:36,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:37,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:37,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948516629] [2024-06-21 17:34:37,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948516629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:37,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:37,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909135178] [2024-06-21 17:34:37,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:37,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:37,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:37,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:37,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:37,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 559 transitions, 8279 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:37,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:37,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:37,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:38,715 INFO L124 PetriNetUnfolderBase]: 3164/4837 cut-off events. [2024-06-21 17:34:38,715 INFO L125 PetriNetUnfolderBase]: For 430150/430150 co-relation queries the response was YES. [2024-06-21 17:34:38,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41318 conditions, 4837 events. 3164/4837 cut-off events. For 430150/430150 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 26616 event pairs, 513 based on Foata normal form. 2/4838 useless extension candidates. Maximal degree in co-relation 41146. Up to 4513 conditions per place. [2024-06-21 17:34:38,783 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 505 selfloop transitions, 71 changer transitions 0/580 dead transitions. [2024-06-21 17:34:38,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 580 transitions, 9855 flow [2024-06-21 17:34:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:34:38,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 17:34:38,785 INFO L175 Difference]: Start difference. First operand has 378 places, 559 transitions, 8279 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:34:38,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 580 transitions, 9855 flow [2024-06-21 17:34:41,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 580 transitions, 9427 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 17:34:41,735 INFO L231 Difference]: Finished difference. Result has 377 places, 565 transitions, 8169 flow [2024-06-21 17:34:41,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7851, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8169, PETRI_PLACES=377, PETRI_TRANSITIONS=565} [2024-06-21 17:34:41,735 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 17:34:41,736 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 565 transitions, 8169 flow [2024-06-21 17:34:41,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:41,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:41,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:41,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:34:41,736 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:41,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1935004469, now seen corresponding path program 26 times [2024-06-21 17:34:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:41,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396410286] [2024-06-21 17:34:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:41,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:42,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:42,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396410286] [2024-06-21 17:34:42,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396410286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:42,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:42,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:42,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523746858] [2024-06-21 17:34:42,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:42,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:42,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:42,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:42,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:42,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:42,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 565 transitions, 8169 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:42,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:42,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:42,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:43,736 INFO L124 PetriNetUnfolderBase]: 3184/4862 cut-off events. [2024-06-21 17:34:43,736 INFO L125 PetriNetUnfolderBase]: For 445855/445857 co-relation queries the response was YES. [2024-06-21 17:34:43,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41260 conditions, 4862 events. 3184/4862 cut-off events. For 445855/445857 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26698 event pairs, 533 based on Foata normal form. 6/4867 useless extension candidates. Maximal degree in co-relation 41088. Up to 4551 conditions per place. [2024-06-21 17:34:43,812 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 537 selfloop transitions, 44 changer transitions 0/585 dead transitions. [2024-06-21 17:34:43,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 585 transitions, 9677 flow [2024-06-21 17:34:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:34:43,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:34:43,813 INFO L175 Difference]: Start difference. First operand has 377 places, 565 transitions, 8169 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:34:43,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 585 transitions, 9677 flow [2024-06-21 17:34:45,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 585 transitions, 9557 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:34:45,874 INFO L231 Difference]: Finished difference. Result has 381 places, 568 transitions, 8199 flow [2024-06-21 17:34:45,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8051, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8199, PETRI_PLACES=381, PETRI_TRANSITIONS=568} [2024-06-21 17:34:45,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-21 17:34:45,875 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 568 transitions, 8199 flow [2024-06-21 17:34:45,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:45,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:45,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:45,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:34:45,875 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:45,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1757752793, now seen corresponding path program 4 times [2024-06-21 17:34:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:45,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526692000] [2024-06-21 17:34:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:45,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:46,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:46,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526692000] [2024-06-21 17:34:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526692000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:46,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:46,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:46,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209873933] [2024-06-21 17:34:46,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:46,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:46,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:46,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:46,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 568 transitions, 8199 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:46,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:46,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:46,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:47,979 INFO L124 PetriNetUnfolderBase]: 3178/4853 cut-off events. [2024-06-21 17:34:47,979 INFO L125 PetriNetUnfolderBase]: For 430618/430618 co-relation queries the response was YES. [2024-06-21 17:34:48,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41048 conditions, 4853 events. 3178/4853 cut-off events. For 430618/430618 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26638 event pairs, 537 based on Foata normal form. 2/4854 useless extension candidates. Maximal degree in co-relation 40875. Up to 4617 conditions per place. [2024-06-21 17:34:48,052 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 530 selfloop transitions, 46 changer transitions 0/580 dead transitions. [2024-06-21 17:34:48,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 580 transitions, 9391 flow [2024-06-21 17:34:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:34:48,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:34:48,053 INFO L175 Difference]: Start difference. First operand has 381 places, 568 transitions, 8199 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:34:48,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 580 transitions, 9391 flow [2024-06-21 17:34:50,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 580 transitions, 9254 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 17:34:50,803 INFO L231 Difference]: Finished difference. Result has 384 places, 568 transitions, 8160 flow [2024-06-21 17:34:50,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8062, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8160, PETRI_PLACES=384, PETRI_TRANSITIONS=568} [2024-06-21 17:34:50,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-21 17:34:50,803 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 568 transitions, 8160 flow [2024-06-21 17:34:50,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:50,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:50,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:50,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:34:50,804 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:50,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1757872949, now seen corresponding path program 27 times [2024-06-21 17:34:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:50,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512499370] [2024-06-21 17:34:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512499370] [2024-06-21 17:34:51,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512499370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:51,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:51,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:51,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446297065] [2024-06-21 17:34:51,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:51,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:51,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:51,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:51,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:51,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:51,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 568 transitions, 8160 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:51,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:51,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:51,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:52,686 INFO L124 PetriNetUnfolderBase]: 3166/4836 cut-off events. [2024-06-21 17:34:52,686 INFO L125 PetriNetUnfolderBase]: For 431691/431693 co-relation queries the response was YES. [2024-06-21 17:34:52,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40504 conditions, 4836 events. 3166/4836 cut-off events. For 431691/431693 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26550 event pairs, 538 based on Foata normal form. 6/4841 useless extension candidates. Maximal degree in co-relation 40330. Up to 4635 conditions per place. [2024-06-21 17:34:52,756 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 552 selfloop transitions, 26 changer transitions 0/582 dead transitions. [2024-06-21 17:34:52,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 582 transitions, 9404 flow [2024-06-21 17:34:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 17:34:52,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 17:34:52,757 INFO L175 Difference]: Start difference. First operand has 384 places, 568 transitions, 8160 flow. Second operand 8 states and 131 transitions. [2024-06-21 17:34:52,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 582 transitions, 9404 flow [2024-06-21 17:34:55,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 582 transitions, 9211 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 17:34:55,292 INFO L231 Difference]: Finished difference. Result has 385 places, 568 transitions, 8025 flow [2024-06-21 17:34:55,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8025, PETRI_PLACES=385, PETRI_TRANSITIONS=568} [2024-06-21 17:34:55,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-21 17:34:55,293 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 568 transitions, 8025 flow [2024-06-21 17:34:55,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:55,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:55,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:55,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:34:55,293 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:55,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1777694097, now seen corresponding path program 4 times [2024-06-21 17:34:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:55,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790245242] [2024-06-21 17:34:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:56,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:56,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790245242] [2024-06-21 17:34:56,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790245242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:56,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:56,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:34:56,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039508854] [2024-06-21 17:34:56,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:56,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:34:56,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:34:56,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:34:56,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:34:56,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 568 transitions, 8025 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:56,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:56,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:34:56,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:57,461 INFO L124 PetriNetUnfolderBase]: 3168/4838 cut-off events. [2024-06-21 17:34:57,462 INFO L125 PetriNetUnfolderBase]: For 428033/428033 co-relation queries the response was YES. [2024-06-21 17:34:57,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40398 conditions, 4838 events. 3168/4838 cut-off events. For 428033/428033 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 26548 event pairs, 539 based on Foata normal form. 2/4839 useless extension candidates. Maximal degree in co-relation 40223. Up to 4452 conditions per place. [2024-06-21 17:34:57,538 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 496 selfloop transitions, 85 changer transitions 0/585 dead transitions. [2024-06-21 17:34:57,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 585 transitions, 9301 flow [2024-06-21 17:34:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:34:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:34:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 17:34:57,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:34:57,538 INFO L175 Difference]: Start difference. First operand has 385 places, 568 transitions, 8025 flow. Second operand 6 states and 114 transitions. [2024-06-21 17:34:57,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 585 transitions, 9301 flow [2024-06-21 17:35:00,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 585 transitions, 9082 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 17:35:00,444 INFO L231 Difference]: Finished difference. Result has 382 places, 571 transitions, 8112 flow [2024-06-21 17:35:00,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8112, PETRI_PLACES=382, PETRI_TRANSITIONS=571} [2024-06-21 17:35:00,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-21 17:35:00,444 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 571 transitions, 8112 flow [2024-06-21 17:35:00,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:00,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:00,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:00,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:35:00,445 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:00,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2017869159, now seen corresponding path program 1 times [2024-06-21 17:35:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:00,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435050368] [2024-06-21 17:35:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:00,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:01,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:01,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435050368] [2024-06-21 17:35:01,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435050368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:01,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:01,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:01,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105405482] [2024-06-21 17:35:01,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:01,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:01,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:01,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:01,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:01,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:01,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 571 transitions, 8112 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:01,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:01,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:01,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:02,791 INFO L124 PetriNetUnfolderBase]: 3255/4967 cut-off events. [2024-06-21 17:35:02,791 INFO L125 PetriNetUnfolderBase]: For 500683/500683 co-relation queries the response was YES. [2024-06-21 17:35:02,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42412 conditions, 4967 events. 3255/4967 cut-off events. For 500683/500683 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27350 event pairs, 495 based on Foata normal form. 8/4974 useless extension candidates. Maximal degree in co-relation 42237. Up to 4413 conditions per place. [2024-06-21 17:35:02,864 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 529 selfloop transitions, 88 changer transitions 0/621 dead transitions. [2024-06-21 17:35:02,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 621 transitions, 9832 flow [2024-06-21 17:35:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:35:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:35:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 17:35:02,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 17:35:02,865 INFO L175 Difference]: Start difference. First operand has 382 places, 571 transitions, 8112 flow. Second operand 10 states and 182 transitions. [2024-06-21 17:35:02,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 621 transitions, 9832 flow [2024-06-21 17:35:05,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 621 transitions, 9666 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:35:05,585 INFO L231 Difference]: Finished difference. Result has 390 places, 576 transitions, 8237 flow [2024-06-21 17:35:05,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7946, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8237, PETRI_PLACES=390, PETRI_TRANSITIONS=576} [2024-06-21 17:35:05,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 17:35:05,586 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 576 transitions, 8237 flow [2024-06-21 17:35:05,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:05,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:05,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:05,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:35:05,586 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:05,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:05,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2019746829, now seen corresponding path program 2 times [2024-06-21 17:35:05,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:05,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844203425] [2024-06-21 17:35:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:05,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:06,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:06,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844203425] [2024-06-21 17:35:06,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844203425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:06,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:06,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131630116] [2024-06-21 17:35:06,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:06,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:06,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:06,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:06,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:06,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 576 transitions, 8237 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:06,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:06,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:06,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:08,133 INFO L124 PetriNetUnfolderBase]: 3299/5042 cut-off events. [2024-06-21 17:35:08,133 INFO L125 PetriNetUnfolderBase]: For 527901/527901 co-relation queries the response was YES. [2024-06-21 17:35:08,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43248 conditions, 5042 events. 3299/5042 cut-off events. For 527901/527901 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 27904 event pairs, 504 based on Foata normal form. 12/5053 useless extension candidates. Maximal degree in co-relation 43070. Up to 4653 conditions per place. [2024-06-21 17:35:08,212 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 520 selfloop transitions, 89 changer transitions 0/613 dead transitions. [2024-06-21 17:35:08,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 613 transitions, 9659 flow [2024-06-21 17:35:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:35:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:35:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-21 17:35:08,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 17:35:08,213 INFO L175 Difference]: Start difference. First operand has 390 places, 576 transitions, 8237 flow. Second operand 12 states and 202 transitions. [2024-06-21 17:35:08,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 613 transitions, 9659 flow [2024-06-21 17:35:10,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 613 transitions, 9532 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:10,689 INFO L231 Difference]: Finished difference. Result has 397 places, 577 transitions, 8321 flow [2024-06-21 17:35:10,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8321, PETRI_PLACES=397, PETRI_TRANSITIONS=577} [2024-06-21 17:35:10,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-21 17:35:10,690 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 577 transitions, 8321 flow [2024-06-21 17:35:10,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:10,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:10,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:10,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:35:10,690 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:10,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:10,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1635581151, now seen corresponding path program 3 times [2024-06-21 17:35:10,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:10,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503615184] [2024-06-21 17:35:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:11,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:11,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503615184] [2024-06-21 17:35:11,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503615184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:11,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:11,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:11,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031553589] [2024-06-21 17:35:11,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:11,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:11,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:11,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:11,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:11,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 577 transitions, 8321 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:11,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:11,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:11,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:13,243 INFO L124 PetriNetUnfolderBase]: 3327/5084 cut-off events. [2024-06-21 17:35:13,243 INFO L125 PetriNetUnfolderBase]: For 523292/523292 co-relation queries the response was YES. [2024-06-21 17:35:13,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43905 conditions, 5084 events. 3327/5084 cut-off events. For 523292/523292 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28226 event pairs, 508 based on Foata normal form. 8/5091 useless extension candidates. Maximal degree in co-relation 43725. Up to 4649 conditions per place. [2024-06-21 17:35:13,316 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 526 selfloop transitions, 90 changer transitions 0/620 dead transitions. [2024-06-21 17:35:13,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 620 transitions, 9830 flow [2024-06-21 17:35:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:35:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:35:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-21 17:35:13,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-21 17:35:13,317 INFO L175 Difference]: Start difference. First operand has 397 places, 577 transitions, 8321 flow. Second operand 11 states and 194 transitions. [2024-06-21 17:35:13,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 620 transitions, 9830 flow [2024-06-21 17:35:16,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 620 transitions, 9658 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:35:16,615 INFO L231 Difference]: Finished difference. Result has 400 places, 581 transitions, 8413 flow [2024-06-21 17:35:16,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8149, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8413, PETRI_PLACES=400, PETRI_TRANSITIONS=581} [2024-06-21 17:35:16,615 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-21 17:35:16,615 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 581 transitions, 8413 flow [2024-06-21 17:35:16,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:16,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:16,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:16,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:35:16,616 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:16,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1385647715, now seen corresponding path program 1 times [2024-06-21 17:35:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303761431] [2024-06-21 17:35:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:16,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:17,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303761431] [2024-06-21 17:35:17,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303761431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:17,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:17,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:17,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287439203] [2024-06-21 17:35:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:17,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:17,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:17,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:17,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 581 transitions, 8413 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:17,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:17,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:17,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:19,202 INFO L124 PetriNetUnfolderBase]: 3335/5098 cut-off events. [2024-06-21 17:35:19,202 INFO L125 PetriNetUnfolderBase]: For 509750/509750 co-relation queries the response was YES. [2024-06-21 17:35:19,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44192 conditions, 5098 events. 3335/5098 cut-off events. For 509750/509750 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 28331 event pairs, 524 based on Foata normal form. 2/5099 useless extension candidates. Maximal degree in co-relation 44010. Up to 4899 conditions per place. [2024-06-21 17:35:19,274 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 566 selfloop transitions, 34 changer transitions 0/604 dead transitions. [2024-06-21 17:35:19,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 604 transitions, 9741 flow [2024-06-21 17:35:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:35:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:35:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:35:19,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:35:19,275 INFO L175 Difference]: Start difference. First operand has 400 places, 581 transitions, 8413 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:35:19,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 604 transitions, 9741 flow [2024-06-21 17:35:22,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 604 transitions, 9616 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:35:22,265 INFO L231 Difference]: Finished difference. Result has 402 places, 583 transitions, 8408 flow [2024-06-21 17:35:22,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8288, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8408, PETRI_PLACES=402, PETRI_TRANSITIONS=583} [2024-06-21 17:35:22,265 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-21 17:35:22,265 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 583 transitions, 8408 flow [2024-06-21 17:35:22,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:22,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:22,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:22,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:35:22,265 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:22,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:22,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1385641763, now seen corresponding path program 4 times [2024-06-21 17:35:22,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:22,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306180058] [2024-06-21 17:35:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306180058] [2024-06-21 17:35:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306180058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:23,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:23,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146259159] [2024-06-21 17:35:23,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:23,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:23,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:23,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:23,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 583 transitions, 8408 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:23,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:23,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:23,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:24,796 INFO L124 PetriNetUnfolderBase]: 3381/5166 cut-off events. [2024-06-21 17:35:24,796 INFO L125 PetriNetUnfolderBase]: For 554323/554323 co-relation queries the response was YES. [2024-06-21 17:35:24,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44918 conditions, 5166 events. 3381/5166 cut-off events. For 554323/554323 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28764 event pairs, 534 based on Foata normal form. 10/5175 useless extension candidates. Maximal degree in co-relation 44734. Up to 4915 conditions per place. [2024-06-21 17:35:24,869 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 573 selfloop transitions, 37 changer transitions 0/614 dead transitions. [2024-06-21 17:35:24,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 614 transitions, 9832 flow [2024-06-21 17:35:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:35:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:35:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 17:35:24,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 17:35:24,870 INFO L175 Difference]: Start difference. First operand has 402 places, 583 transitions, 8408 flow. Second operand 10 states and 168 transitions. [2024-06-21 17:35:24,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 614 transitions, 9832 flow [2024-06-21 17:35:28,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 614 transitions, 9744 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:35:28,093 INFO L231 Difference]: Finished difference. Result has 407 places, 587 transitions, 8472 flow [2024-06-21 17:35:28,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8320, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8472, PETRI_PLACES=407, PETRI_TRANSITIONS=587} [2024-06-21 17:35:28,093 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 17:35:28,093 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 587 transitions, 8472 flow [2024-06-21 17:35:28,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:28,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:28,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:28,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:35:28,094 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:28,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2025136929, now seen corresponding path program 5 times [2024-06-21 17:35:28,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:28,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219939960] [2024-06-21 17:35:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:28,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:29,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:29,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219939960] [2024-06-21 17:35:29,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219939960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:29,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:29,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:29,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811489382] [2024-06-21 17:35:29,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:29,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:29,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:29,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:29,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:29,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 587 transitions, 8472 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:29,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:29,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:29,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:30,648 INFO L124 PetriNetUnfolderBase]: 3481/5320 cut-off events. [2024-06-21 17:35:30,648 INFO L125 PetriNetUnfolderBase]: For 612500/612500 co-relation queries the response was YES. [2024-06-21 17:35:30,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47478 conditions, 5320 events. 3481/5320 cut-off events. For 612500/612500 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 29754 event pairs, 536 based on Foata normal form. 8/5327 useless extension candidates. Maximal degree in co-relation 47292. Up to 4926 conditions per place. [2024-06-21 17:35:30,725 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 571 selfloop transitions, 47 changer transitions 0/622 dead transitions. [2024-06-21 17:35:30,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 622 transitions, 10154 flow [2024-06-21 17:35:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:35:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:35:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:35:30,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 17:35:30,726 INFO L175 Difference]: Start difference. First operand has 407 places, 587 transitions, 8472 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:35:30,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 622 transitions, 10154 flow [2024-06-21 17:35:33,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 622 transitions, 10064 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:35:33,855 INFO L231 Difference]: Finished difference. Result has 410 places, 590 transitions, 8562 flow [2024-06-21 17:35:33,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8562, PETRI_PLACES=410, PETRI_TRANSITIONS=590} [2024-06-21 17:35:33,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 17:35:33,856 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 590 transitions, 8562 flow [2024-06-21 17:35:33,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:33,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:33,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:33,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:35:33,857 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:33,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2025140649, now seen corresponding path program 6 times [2024-06-21 17:35:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:33,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313859026] [2024-06-21 17:35:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:34,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313859026] [2024-06-21 17:35:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313859026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:34,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:34,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:34,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602405794] [2024-06-21 17:35:34,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:34,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:34,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:34,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 590 transitions, 8562 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:34,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:34,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:34,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:36,660 INFO L124 PetriNetUnfolderBase]: 3517/5374 cut-off events. [2024-06-21 17:35:36,660 INFO L125 PetriNetUnfolderBase]: For 634966/634966 co-relation queries the response was YES. [2024-06-21 17:35:36,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48218 conditions, 5374 events. 3517/5374 cut-off events. For 634966/634966 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30149 event pairs, 554 based on Foata normal form. 10/5383 useless extension candidates. Maximal degree in co-relation 48030. Up to 5064 conditions per place. [2024-06-21 17:35:36,754 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 569 selfloop transitions, 47 changer transitions 0/620 dead transitions. [2024-06-21 17:35:36,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 620 transitions, 9981 flow [2024-06-21 17:35:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:35:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:35:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 17:35:36,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-21 17:35:36,755 INFO L175 Difference]: Start difference. First operand has 410 places, 590 transitions, 8562 flow. Second operand 11 states and 183 transitions. [2024-06-21 17:35:36,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 620 transitions, 9981 flow [2024-06-21 17:35:39,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 620 transitions, 9909 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:35:39,663 INFO L231 Difference]: Finished difference. Result has 415 places, 591 transitions, 8628 flow [2024-06-21 17:35:39,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8492, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8628, PETRI_PLACES=415, PETRI_TRANSITIONS=591} [2024-06-21 17:35:39,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-21 17:35:39,664 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 591 transitions, 8628 flow [2024-06-21 17:35:39,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:39,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:39,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:39,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:35:39,664 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:39,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1391211905, now seen corresponding path program 2 times [2024-06-21 17:35:39,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:39,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107804333] [2024-06-21 17:35:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:39,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:40,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:40,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107804333] [2024-06-21 17:35:40,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107804333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:40,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:40,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662343953] [2024-06-21 17:35:40,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:40,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:40,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:40,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:40,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:40,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:40,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 591 transitions, 8628 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:40,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:40,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:40,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:42,255 INFO L124 PetriNetUnfolderBase]: 3512/5367 cut-off events. [2024-06-21 17:35:42,256 INFO L125 PetriNetUnfolderBase]: For 601550/601550 co-relation queries the response was YES. [2024-06-21 17:35:42,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48135 conditions, 5367 events. 3512/5367 cut-off events. For 601550/601550 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30182 event pairs, 567 based on Foata normal form. 2/5368 useless extension candidates. Maximal degree in co-relation 47945. Up to 5170 conditions per place. [2024-06-21 17:35:42,334 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 577 selfloop transitions, 35 changer transitions 0/616 dead transitions. [2024-06-21 17:35:42,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 616 transitions, 9993 flow [2024-06-21 17:35:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:35:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:35:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 17:35:42,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-21 17:35:42,335 INFO L175 Difference]: Start difference. First operand has 415 places, 591 transitions, 8628 flow. Second operand 11 states and 174 transitions. [2024-06-21 17:35:42,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 616 transitions, 9993 flow [2024-06-21 17:35:46,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 616 transitions, 9897 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:35:46,214 INFO L231 Difference]: Finished difference. Result has 417 places, 593 transitions, 8663 flow [2024-06-21 17:35:46,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8532, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8663, PETRI_PLACES=417, PETRI_TRANSITIONS=593} [2024-06-21 17:35:46,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-21 17:35:46,214 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 593 transitions, 8663 flow [2024-06-21 17:35:46,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:46,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:46,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:46,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:35:46,215 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:46,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:46,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1391219345, now seen corresponding path program 3 times [2024-06-21 17:35:46,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:46,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120850132] [2024-06-21 17:35:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:46,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:47,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:47,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120850132] [2024-06-21 17:35:47,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120850132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:47,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:47,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:47,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437529708] [2024-06-21 17:35:47,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:47,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:47,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:47,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:47,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:47,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 593 transitions, 8663 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:47,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:47,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:47,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:48,736 INFO L124 PetriNetUnfolderBase]: 3520/5379 cut-off events. [2024-06-21 17:35:48,737 INFO L125 PetriNetUnfolderBase]: For 613272/613272 co-relation queries the response was YES. [2024-06-21 17:35:48,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48320 conditions, 5379 events. 3520/5379 cut-off events. For 613272/613272 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30239 event pairs, 557 based on Foata normal form. 2/5380 useless extension candidates. Maximal degree in co-relation 48129. Up to 5162 conditions per place. [2024-06-21 17:35:48,819 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 573 selfloop transitions, 41 changer transitions 0/618 dead transitions. [2024-06-21 17:35:48,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 618 transitions, 10016 flow [2024-06-21 17:35:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:35:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:35:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 17:35:48,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-21 17:35:48,820 INFO L175 Difference]: Start difference. First operand has 417 places, 593 transitions, 8663 flow. Second operand 11 states and 174 transitions. [2024-06-21 17:35:48,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 618 transitions, 10016 flow [2024-06-21 17:35:51,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 618 transitions, 9911 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 17:35:51,542 INFO L231 Difference]: Finished difference. Result has 420 places, 595 transitions, 8691 flow [2024-06-21 17:35:51,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8558, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8691, PETRI_PLACES=420, PETRI_TRANSITIONS=595} [2024-06-21 17:35:51,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-21 17:35:51,543 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 595 transitions, 8691 flow [2024-06-21 17:35:51,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:51,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:51,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:51,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:35:51,543 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:51,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1391004143, now seen corresponding path program 7 times [2024-06-21 17:35:51,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:51,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838253917] [2024-06-21 17:35:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:51,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:52,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838253917] [2024-06-21 17:35:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838253917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:52,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:52,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:52,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905140841] [2024-06-21 17:35:52,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:52,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:52,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:52,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:52,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:52,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 595 transitions, 8691 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:52,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:52,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:52,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:54,208 INFO L124 PetriNetUnfolderBase]: 3497/5346 cut-off events. [2024-06-21 17:35:54,208 INFO L125 PetriNetUnfolderBase]: For 614704/614704 co-relation queries the response was YES. [2024-06-21 17:35:54,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47253 conditions, 5346 events. 3497/5346 cut-off events. For 614704/614704 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30043 event pairs, 558 based on Foata normal form. 10/5355 useless extension candidates. Maximal degree in co-relation 47061. Up to 5095 conditions per place. [2024-06-21 17:35:54,291 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 583 selfloop transitions, 38 changer transitions 0/625 dead transitions. [2024-06-21 17:35:54,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 625 transitions, 10116 flow [2024-06-21 17:35:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:35:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:35:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 17:35:54,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:35:54,292 INFO L175 Difference]: Start difference. First operand has 420 places, 595 transitions, 8691 flow. Second operand 12 states and 192 transitions. [2024-06-21 17:35:54,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 625 transitions, 10116 flow [2024-06-21 17:35:57,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 625 transitions, 9983 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 17:35:57,189 INFO L231 Difference]: Finished difference. Result has 424 places, 596 transitions, 8677 flow [2024-06-21 17:35:57,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8568, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8677, PETRI_PLACES=424, PETRI_TRANSITIONS=596} [2024-06-21 17:35:57,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-21 17:35:57,190 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 596 transitions, 8677 flow [2024-06-21 17:35:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:57,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:57,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:57,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:35:57,190 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:57,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:57,190 INFO L85 PathProgramCache]: Analyzing trace with hash -840074235, now seen corresponding path program 4 times [2024-06-21 17:35:57,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:57,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936638453] [2024-06-21 17:35:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:57,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:58,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:58,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936638453] [2024-06-21 17:35:58,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936638453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:58,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:58,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:35:58,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379519726] [2024-06-21 17:35:58,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:58,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:35:58,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:58,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:35:58,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:35:58,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:35:58,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 596 transitions, 8677 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:58,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:58,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:35:58,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:59,585 INFO L124 PetriNetUnfolderBase]: 3505/5358 cut-off events. [2024-06-21 17:35:59,585 INFO L125 PetriNetUnfolderBase]: For 588421/588421 co-relation queries the response was YES. [2024-06-21 17:35:59,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47331 conditions, 5358 events. 3505/5358 cut-off events. For 588421/588421 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 30192 event pairs, 594 based on Foata normal form. 2/5359 useless extension candidates. Maximal degree in co-relation 47138. Up to 5153 conditions per place. [2024-06-21 17:35:59,676 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 582 selfloop transitions, 34 changer transitions 0/620 dead transitions. [2024-06-21 17:35:59,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 620 transitions, 10047 flow [2024-06-21 17:35:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:35:59,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 17:35:59,677 INFO L175 Difference]: Start difference. First operand has 424 places, 596 transitions, 8677 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:35:59,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 620 transitions, 10047 flow [2024-06-21 17:36:03,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 620 transitions, 9970 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 17:36:03,188 INFO L231 Difference]: Finished difference. Result has 422 places, 598 transitions, 8732 flow [2024-06-21 17:36:03,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8600, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8732, PETRI_PLACES=422, PETRI_TRANSITIONS=598} [2024-06-21 17:36:03,189 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-21 17:36:03,189 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 598 transitions, 8732 flow [2024-06-21 17:36:03,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:03,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:03,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:03,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:36:03,189 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:03,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1935458309, now seen corresponding path program 5 times [2024-06-21 17:36:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670444466] [2024-06-21 17:36:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:03,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:03,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670444466] [2024-06-21 17:36:03,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670444466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:03,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:03,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74618424] [2024-06-21 17:36:03,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:03,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:04,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:04,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 598 transitions, 8732 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:04,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:04,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:04,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:05,536 INFO L124 PetriNetUnfolderBase]: 3513/5372 cut-off events. [2024-06-21 17:36:05,537 INFO L125 PetriNetUnfolderBase]: For 600405/600405 co-relation queries the response was YES. [2024-06-21 17:36:05,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47644 conditions, 5372 events. 3513/5372 cut-off events. For 600405/600405 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 30324 event pairs, 597 based on Foata normal form. 2/5373 useless extension candidates. Maximal degree in co-relation 47450. Up to 5209 conditions per place. [2024-06-21 17:36:05,628 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 594 selfloop transitions, 17 changer transitions 0/615 dead transitions. [2024-06-21 17:36:05,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 615 transitions, 10072 flow [2024-06-21 17:36:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:36:05,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:36:05,629 INFO L175 Difference]: Start difference. First operand has 422 places, 598 transitions, 8732 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:36:05,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 615 transitions, 10072 flow [2024-06-21 17:36:09,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 615 transitions, 9959 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:36:09,282 INFO L231 Difference]: Finished difference. Result has 424 places, 600 transitions, 8721 flow [2024-06-21 17:36:09,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8619, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8721, PETRI_PLACES=424, PETRI_TRANSITIONS=600} [2024-06-21 17:36:09,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-21 17:36:09,282 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 600 transitions, 8721 flow [2024-06-21 17:36:09,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:09,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:09,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:09,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:36:09,283 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:09,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2103008477, now seen corresponding path program 6 times [2024-06-21 17:36:09,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:09,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075372351] [2024-06-21 17:36:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:10,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:10,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075372351] [2024-06-21 17:36:10,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075372351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:10,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:10,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:36:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287436826] [2024-06-21 17:36:10,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:10,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:36:10,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:10,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:36:10,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:36:10,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:10,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 600 transitions, 8721 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:10,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:10,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:10,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:11,743 INFO L124 PetriNetUnfolderBase]: 3521/5382 cut-off events. [2024-06-21 17:36:11,743 INFO L125 PetriNetUnfolderBase]: For 612328/612328 co-relation queries the response was YES. [2024-06-21 17:36:11,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47849 conditions, 5382 events. 3521/5382 cut-off events. For 612328/612328 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30364 event pairs, 605 based on Foata normal form. 2/5383 useless extension candidates. Maximal degree in co-relation 47654. Up to 5206 conditions per place. [2024-06-21 17:36:11,831 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 586 selfloop transitions, 27 changer transitions 0/617 dead transitions. [2024-06-21 17:36:11,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 617 transitions, 10056 flow [2024-06-21 17:36:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:36:11,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:36:11,832 INFO L175 Difference]: Start difference. First operand has 424 places, 600 transitions, 8721 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:36:11,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 617 transitions, 10056 flow [2024-06-21 17:36:15,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 617 transitions, 9973 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:36:15,198 INFO L231 Difference]: Finished difference. Result has 426 places, 602 transitions, 8754 flow [2024-06-21 17:36:15,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8638, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8754, PETRI_PLACES=426, PETRI_TRANSITIONS=602} [2024-06-21 17:36:15,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-21 17:36:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 602 transitions, 8754 flow [2024-06-21 17:36:15,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:15,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:15,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:15,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:36:15,199 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:15,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash -834510045, now seen corresponding path program 7 times [2024-06-21 17:36:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:15,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341217547] [2024-06-21 17:36:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:15,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:16,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341217547] [2024-06-21 17:36:16,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341217547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:16,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:16,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:36:16,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553005536] [2024-06-21 17:36:16,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:16,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:36:16,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:36:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:36:16,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:16,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 602 transitions, 8754 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:16,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:16,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:16,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:17,743 INFO L124 PetriNetUnfolderBase]: 3516/5375 cut-off events. [2024-06-21 17:36:17,743 INFO L125 PetriNetUnfolderBase]: For 613456/613456 co-relation queries the response was YES. [2024-06-21 17:36:17,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47728 conditions, 5375 events. 3516/5375 cut-off events. For 613456/613456 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30301 event pairs, 595 based on Foata normal form. 2/5376 useless extension candidates. Maximal degree in co-relation 47532. Up to 5170 conditions per place. [2024-06-21 17:36:17,835 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 587 selfloop transitions, 32 changer transitions 0/623 dead transitions. [2024-06-21 17:36:17,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 623 transitions, 10132 flow [2024-06-21 17:36:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:36:17,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:36:17,836 INFO L175 Difference]: Start difference. First operand has 426 places, 602 transitions, 8754 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:36:17,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 623 transitions, 10132 flow [2024-06-21 17:36:21,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 623 transitions, 10042 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 17:36:21,576 INFO L231 Difference]: Finished difference. Result has 428 places, 604 transitions, 8802 flow [2024-06-21 17:36:21,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8664, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8802, PETRI_PLACES=428, PETRI_TRANSITIONS=604} [2024-06-21 17:36:21,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 17:36:21,577 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 604 transitions, 8802 flow [2024-06-21 17:36:21,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:21,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:21,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:21,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:36:21,577 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:21,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash -834502605, now seen corresponding path program 8 times [2024-06-21 17:36:21,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:21,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937372831] [2024-06-21 17:36:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:21,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:22,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:22,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937372831] [2024-06-21 17:36:22,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937372831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:22,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:22,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:36:22,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100227686] [2024-06-21 17:36:22,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:22,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:36:22,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:22,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:36:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:36:22,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:22,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 604 transitions, 8802 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:22,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:22,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:22,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:24,050 INFO L124 PetriNetUnfolderBase]: 3524/5389 cut-off events. [2024-06-21 17:36:24,050 INFO L125 PetriNetUnfolderBase]: For 626218/626218 co-relation queries the response was YES. [2024-06-21 17:36:24,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48040 conditions, 5389 events. 3524/5389 cut-off events. For 626218/626218 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30404 event pairs, 591 based on Foata normal form. 2/5390 useless extension candidates. Maximal degree in co-relation 47843. Up to 5162 conditions per place. [2024-06-21 17:36:24,137 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 584 selfloop transitions, 37 changer transitions 0/625 dead transitions. [2024-06-21 17:36:24,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 625 transitions, 10169 flow [2024-06-21 17:36:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:36:24,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:36:24,138 INFO L175 Difference]: Start difference. First operand has 428 places, 604 transitions, 8802 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:36:24,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 625 transitions, 10169 flow [2024-06-21 17:36:28,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 625 transitions, 10058 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 17:36:28,561 INFO L231 Difference]: Finished difference. Result has 431 places, 606 transitions, 8830 flow [2024-06-21 17:36:28,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8830, PETRI_PLACES=431, PETRI_TRANSITIONS=606} [2024-06-21 17:36:28,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-21 17:36:28,562 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 606 transitions, 8830 flow [2024-06-21 17:36:28,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:28,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:28,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:28,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:36:28,563 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:28,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1935250547, now seen corresponding path program 8 times [2024-06-21 17:36:28,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:28,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078121646] [2024-06-21 17:36:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:28,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:29,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:29,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078121646] [2024-06-21 17:36:29,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078121646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:29,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:29,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:36:29,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689253752] [2024-06-21 17:36:29,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:29,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:36:29,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:29,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:36:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:36:29,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:29,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 606 transitions, 8830 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:29,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:29,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:29,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:31,061 INFO L124 PetriNetUnfolderBase]: 3560/5443 cut-off events. [2024-06-21 17:36:31,061 INFO L125 PetriNetUnfolderBase]: For 681594/681594 co-relation queries the response was YES. [2024-06-21 17:36:31,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48723 conditions, 5443 events. 3560/5443 cut-off events. For 681594/681594 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 30736 event pairs, 610 based on Foata normal form. 10/5452 useless extension candidates. Maximal degree in co-relation 48525. Up to 5228 conditions per place. [2024-06-21 17:36:31,148 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 604 selfloop transitions, 20 changer transitions 0/628 dead transitions. [2024-06-21 17:36:31,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 628 transitions, 10234 flow [2024-06-21 17:36:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:36:31,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 17:36:31,149 INFO L175 Difference]: Start difference. First operand has 431 places, 606 transitions, 8830 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:36:31,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 628 transitions, 10234 flow [2024-06-21 17:36:35,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 628 transitions, 10105 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 17:36:35,661 INFO L231 Difference]: Finished difference. Result has 433 places, 607 transitions, 8787 flow [2024-06-21 17:36:35,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8701, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8787, PETRI_PLACES=433, PETRI_TRANSITIONS=607} [2024-06-21 17:36:35,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-21 17:36:35,662 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 607 transitions, 8787 flow [2024-06-21 17:36:35,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:35,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:35,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:35,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:36:35,662 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:35,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash -840224337, now seen corresponding path program 9 times [2024-06-21 17:36:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:35,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495285427] [2024-06-21 17:36:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:36,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:36,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495285427] [2024-06-21 17:36:36,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495285427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:36,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:36,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:36:36,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733591713] [2024-06-21 17:36:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:36,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:36:36,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:36,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:36:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:36:36,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:36,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 607 transitions, 8787 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:36,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:36,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:38,244 INFO L124 PetriNetUnfolderBase]: 3596/5499 cut-off events. [2024-06-21 17:36:38,245 INFO L125 PetriNetUnfolderBase]: For 696767/696767 co-relation queries the response was YES. [2024-06-21 17:36:38,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49313 conditions, 5499 events. 3596/5499 cut-off events. For 696767/696767 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31146 event pairs, 605 based on Foata normal form. 10/5508 useless extension candidates. Maximal degree in co-relation 49115. Up to 5200 conditions per place. [2024-06-21 17:36:38,338 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 586 selfloop transitions, 51 changer transitions 0/641 dead transitions. [2024-06-21 17:36:38,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 641 transitions, 10261 flow [2024-06-21 17:36:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:36:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:36:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 17:36:38,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-21 17:36:38,339 INFO L175 Difference]: Start difference. First operand has 433 places, 607 transitions, 8787 flow. Second operand 10 states and 176 transitions. [2024-06-21 17:36:38,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 641 transitions, 10261 flow [2024-06-21 17:36:41,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 641 transitions, 10204 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:36:41,440 INFO L231 Difference]: Finished difference. Result has 436 places, 608 transitions, 8882 flow [2024-06-21 17:36:41,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8730, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8882, PETRI_PLACES=436, PETRI_TRANSITIONS=608} [2024-06-21 17:36:41,441 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-21 17:36:41,441 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 608 transitions, 8882 flow [2024-06-21 17:36:41,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:41,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:41,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:41,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:36:41,442 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:41,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:41,442 INFO L85 PathProgramCache]: Analyzing trace with hash -840228057, now seen corresponding path program 10 times [2024-06-21 17:36:41,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:41,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168998118] [2024-06-21 17:36:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:41,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:42,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:42,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168998118] [2024-06-21 17:36:42,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168998118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:42,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:42,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:36:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625189354] [2024-06-21 17:36:42,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:42,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:36:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:36:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:36:42,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:42,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 608 transitions, 8882 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:42,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:42,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:42,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:44,017 INFO L124 PetriNetUnfolderBase]: 3624/5540 cut-off events. [2024-06-21 17:36:44,017 INFO L125 PetriNetUnfolderBase]: For 699999/699999 co-relation queries the response was YES. [2024-06-21 17:36:44,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49848 conditions, 5540 events. 3624/5540 cut-off events. For 699999/699999 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31396 event pairs, 581 based on Foata normal form. 8/5547 useless extension candidates. Maximal degree in co-relation 49649. Up to 5061 conditions per place. [2024-06-21 17:36:44,117 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 588 selfloop transitions, 56 changer transitions 0/648 dead transitions. [2024-06-21 17:36:44,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 648 transitions, 10617 flow [2024-06-21 17:36:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:44,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:36:44,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-21 17:36:44,118 INFO L175 Difference]: Start difference. First operand has 436 places, 608 transitions, 8882 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:36:44,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 648 transitions, 10617 flow [2024-06-21 17:36:48,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 648 transitions, 10513 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:36:48,924 INFO L231 Difference]: Finished difference. Result has 439 places, 610 transitions, 8965 flow [2024-06-21 17:36:48,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8778, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8965, PETRI_PLACES=439, PETRI_TRANSITIONS=610} [2024-06-21 17:36:48,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-21 17:36:48,925 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 610 transitions, 8965 flow [2024-06-21 17:36:48,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:48,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:48,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:48,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:36:48,925 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:48,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash -834717807, now seen corresponding path program 11 times [2024-06-21 17:36:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:48,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614338300] [2024-06-21 17:36:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:49,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614338300] [2024-06-21 17:36:49,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614338300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:49,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:49,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:36:49,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104353928] [2024-06-21 17:36:49,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:49,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:36:49,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:49,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:36:49,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:36:50,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:50,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 610 transitions, 8965 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:50,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:50,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:50,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:51,546 INFO L124 PetriNetUnfolderBase]: 3601/5512 cut-off events. [2024-06-21 17:36:51,547 INFO L125 PetriNetUnfolderBase]: For 665430/665430 co-relation queries the response was YES. [2024-06-21 17:36:51,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48579 conditions, 5512 events. 3601/5512 cut-off events. For 665430/665430 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31302 event pairs, 600 based on Foata normal form. 10/5521 useless extension candidates. Maximal degree in co-relation 48378. Up to 5251 conditions per place. [2024-06-21 17:36:51,641 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 597 selfloop transitions, 35 changer transitions 0/636 dead transitions. [2024-06-21 17:36:51,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 636 transitions, 10408 flow [2024-06-21 17:36:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:36:51,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 17:36:51,642 INFO L175 Difference]: Start difference. First operand has 439 places, 610 transitions, 8965 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:36:51,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 636 transitions, 10408 flow [2024-06-21 17:36:56,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 636 transitions, 10114 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 17:36:56,243 INFO L231 Difference]: Finished difference. Result has 439 places, 611 transitions, 8794 flow [2024-06-21 17:36:56,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8794, PETRI_PLACES=439, PETRI_TRANSITIONS=611} [2024-06-21 17:36:56,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-21 17:36:56,244 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 611 transitions, 8794 flow [2024-06-21 17:36:56,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:56,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:56,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:56,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 17:36:56,244 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:56,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash 550278655, now seen corresponding path program 9 times [2024-06-21 17:36:56,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:56,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333256575] [2024-06-21 17:36:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:57,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:57,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333256575] [2024-06-21 17:36:57,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333256575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:57,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:57,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:57,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457779039] [2024-06-21 17:36:57,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:57,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:57,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:36:57,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 611 transitions, 8794 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:57,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:57,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:36:57,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:58,613 INFO L124 PetriNetUnfolderBase]: 3617/5534 cut-off events. [2024-06-21 17:36:58,613 INFO L125 PetriNetUnfolderBase]: For 624558/624558 co-relation queries the response was YES. [2024-06-21 17:36:58,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47760 conditions, 5534 events. 3617/5534 cut-off events. For 624558/624558 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31439 event pairs, 621 based on Foata normal form. 2/5535 useless extension candidates. Maximal degree in co-relation 47560. Up to 5359 conditions per place. [2024-06-21 17:36:58,711 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 606 selfloop transitions, 20 changer transitions 0/630 dead transitions. [2024-06-21 17:36:58,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 630 transitions, 10167 flow [2024-06-21 17:36:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:36:58,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:36:58,712 INFO L175 Difference]: Start difference. First operand has 439 places, 611 transitions, 8794 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:36:58,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 630 transitions, 10167 flow [2024-06-21 17:37:03,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 630 transitions, 10090 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:37:03,077 INFO L231 Difference]: Finished difference. Result has 441 places, 615 transitions, 8844 flow [2024-06-21 17:37:03,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8717, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8844, PETRI_PLACES=441, PETRI_TRANSITIONS=615} [2024-06-21 17:37:03,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-21 17:37:03,077 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 615 transitions, 8844 flow [2024-06-21 17:37:03,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:03,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:03,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 17:37:03,077 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:03,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1942615589, now seen corresponding path program 10 times [2024-06-21 17:37:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:03,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990474939] [2024-06-21 17:37:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:03,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:03,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:03,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990474939] [2024-06-21 17:37:03,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990474939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:03,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:03,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:37:03,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605797092] [2024-06-21 17:37:03,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:03,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:37:03,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:37:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:37:04,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:37:04,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 615 transitions, 8844 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:04,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:04,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:37:04,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:05,473 INFO L124 PetriNetUnfolderBase]: 3625/5548 cut-off events. [2024-06-21 17:37:05,473 INFO L125 PetriNetUnfolderBase]: For 625636/625636 co-relation queries the response was YES. [2024-06-21 17:37:05,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47900 conditions, 5548 events. 3625/5548 cut-off events. For 625636/625636 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31514 event pairs, 615 based on Foata normal form. 2/5549 useless extension candidates. Maximal degree in co-relation 47698. Up to 5342 conditions per place. [2024-06-21 17:37:05,563 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 595 selfloop transitions, 33 changer transitions 0/632 dead transitions. [2024-06-21 17:37:05,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 632 transitions, 10217 flow [2024-06-21 17:37:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:37:05,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:37:05,564 INFO L175 Difference]: Start difference. First operand has 441 places, 615 transitions, 8844 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:37:05,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 632 transitions, 10217 flow [2024-06-21 17:37:08,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 632 transitions, 10130 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:08,984 INFO L231 Difference]: Finished difference. Result has 444 places, 617 transitions, 8899 flow [2024-06-21 17:37:08,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8757, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8899, PETRI_PLACES=444, PETRI_TRANSITIONS=617} [2024-06-21 17:37:08,985 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 403 predicate places. [2024-06-21 17:37:08,985 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 617 transitions, 8899 flow [2024-06-21 17:37:08,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:08,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:08,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:08,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 17:37:08,985 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:08,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:08,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1942607932, now seen corresponding path program 1 times [2024-06-21 17:37:08,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:08,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971771885] [2024-06-21 17:37:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:08,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:09,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:09,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971771885] [2024-06-21 17:37:09,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971771885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:09,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:09,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:09,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305088119] [2024-06-21 17:37:09,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:09,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:09,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:09,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:09,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:09,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:37:09,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 617 transitions, 8899 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:09,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:09,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:37:09,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:11,276 INFO L124 PetriNetUnfolderBase]: 3622/5542 cut-off events. [2024-06-21 17:37:11,276 INFO L125 PetriNetUnfolderBase]: For 624660/624660 co-relation queries the response was YES. [2024-06-21 17:37:11,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47900 conditions, 5542 events. 3622/5542 cut-off events. For 624660/624660 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31480 event pairs, 620 based on Foata normal form. 1/5542 useless extension candidates. Maximal degree in co-relation 47697. Up to 5367 conditions per place. [2024-06-21 17:37:11,374 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 599 selfloop transitions, 29 changer transitions 0/632 dead transitions. [2024-06-21 17:37:11,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 632 transitions, 10220 flow [2024-06-21 17:37:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:37:11,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:37:11,375 INFO L175 Difference]: Start difference. First operand has 444 places, 617 transitions, 8899 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:37:11,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 632 transitions, 10220 flow [2024-06-21 17:37:15,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 632 transitions, 10086 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:15,969 INFO L231 Difference]: Finished difference. Result has 446 places, 617 transitions, 8833 flow [2024-06-21 17:37:15,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8765, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8833, PETRI_PLACES=446, PETRI_TRANSITIONS=617} [2024-06-21 17:37:15,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2024-06-21 17:37:15,970 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 617 transitions, 8833 flow [2024-06-21 17:37:15,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:15,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:15,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:15,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 17:37:15,971 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:15,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2093804267, now seen corresponding path program 11 times [2024-06-21 17:37:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:15,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732200486] [2024-06-21 17:37:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:15,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:16,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:16,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732200486] [2024-06-21 17:37:16,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732200486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:16,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:16,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:37:16,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850944199] [2024-06-21 17:37:16,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:16,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:37:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:37:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:37:16,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:37:16,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 617 transitions, 8833 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:16,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:16,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:37:16,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:18,371 INFO L124 PetriNetUnfolderBase]: 3617/5535 cut-off events. [2024-06-21 17:37:18,371 INFO L125 PetriNetUnfolderBase]: For 616782/616782 co-relation queries the response was YES. [2024-06-21 17:37:18,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47382 conditions, 5535 events. 3617/5535 cut-off events. For 616782/616782 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31387 event pairs, 617 based on Foata normal form. 2/5536 useless extension candidates. Maximal degree in co-relation 47178. Up to 5369 conditions per place. [2024-06-21 17:37:18,466 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 613 selfloop transitions, 17 changer transitions 0/634 dead transitions. [2024-06-21 17:37:18,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 634 transitions, 10204 flow [2024-06-21 17:37:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:37:18,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 17:37:18,467 INFO L175 Difference]: Start difference. First operand has 446 places, 617 transitions, 8833 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:37:18,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 634 transitions, 10204 flow [2024-06-21 17:37:22,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 634 transitions, 9988 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 17:37:22,827 INFO L231 Difference]: Finished difference. Result has 445 places, 619 transitions, 8724 flow [2024-06-21 17:37:22,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8617, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8724, PETRI_PLACES=445, PETRI_TRANSITIONS=619} [2024-06-21 17:37:22,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-21 17:37:22,827 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 619 transitions, 8724 flow [2024-06-21 17:37:22,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:22,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:22,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:22,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 17:37:22,828 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:22,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1242796776, now seen corresponding path program 1 times [2024-06-21 17:37:22,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:22,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612790079] [2024-06-21 17:37:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:23,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:23,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612790079] [2024-06-21 17:37:23,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612790079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:23,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:23,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:37:23,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748193429] [2024-06-21 17:37:23,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:23,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:37:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:23,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:37:23,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:37:24,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:37:24,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 619 transitions, 8724 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:24,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:24,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:37:24,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:25,480 INFO L124 PetriNetUnfolderBase]: 3630/5552 cut-off events. [2024-06-21 17:37:25,480 INFO L125 PetriNetUnfolderBase]: For 629327/629327 co-relation queries the response was YES. [2024-06-21 17:37:25,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47565 conditions, 5552 events. 3630/5552 cut-off events. For 629327/629327 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 31508 event pairs, 630 based on Foata normal form. 1/5552 useless extension candidates. Maximal degree in co-relation 47362. Up to 5064 conditions per place. [2024-06-21 17:37:25,576 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 496 selfloop transitions, 145 changer transitions 0/645 dead transitions. [2024-06-21 17:37:25,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 645 transitions, 10442 flow [2024-06-21 17:37:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:37:25,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 17:37:25,577 INFO L175 Difference]: Start difference. First operand has 445 places, 619 transitions, 8724 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:37:25,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 645 transitions, 10442 flow [2024-06-21 17:37:31,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 645 transitions, 10347 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:31,157 INFO L231 Difference]: Finished difference. Result has 447 places, 625 transitions, 9109 flow [2024-06-21 17:37:31,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8631, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9109, PETRI_PLACES=447, PETRI_TRANSITIONS=625} [2024-06-21 17:37:31,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-21 17:37:31,158 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 625 transitions, 9109 flow [2024-06-21 17:37:31,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:31,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:31,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:31,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 17:37:31,158 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:31,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1424914825, now seen corresponding path program 1 times [2024-06-21 17:37:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:31,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960270382] [2024-06-21 17:37:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:32,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960270382] [2024-06-21 17:37:32,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960270382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:32,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:32,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:37:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852800656] [2024-06-21 17:37:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:32,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:37:32,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:37:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:37:32,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:37:32,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 625 transitions, 9109 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:32,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:32,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:37:32,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:33,824 INFO L124 PetriNetUnfolderBase]: 3751/5725 cut-off events. [2024-06-21 17:37:33,824 INFO L125 PetriNetUnfolderBase]: For 703838/703838 co-relation queries the response was YES. [2024-06-21 17:37:33,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50854 conditions, 5725 events. 3751/5725 cut-off events. For 703838/703838 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32537 event pairs, 551 based on Foata normal form. 6/5730 useless extension candidates. Maximal degree in co-relation 50650. Up to 4988 conditions per place. [2024-06-21 17:37:33,924 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 487 selfloop transitions, 201 changer transitions 0/692 dead transitions. [2024-06-21 17:37:33,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 692 transitions, 11800 flow [2024-06-21 17:37:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:37:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:37:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 17:37:33,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-21 17:37:33,925 INFO L175 Difference]: Start difference. First operand has 447 places, 625 transitions, 9109 flow. Second operand 10 states and 183 transitions. [2024-06-21 17:37:33,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 692 transitions, 11800 flow [2024-06-21 17:37:39,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 692 transitions, 11662 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 17:37:39,636 INFO L231 Difference]: Finished difference. Result has 457 places, 659 transitions, 10226 flow [2024-06-21 17:37:39,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8987, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10226, PETRI_PLACES=457, PETRI_TRANSITIONS=659} [2024-06-21 17:37:39,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-21 17:37:39,637 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 659 transitions, 10226 flow [2024-06-21 17:37:39,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:39,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:39,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:39,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 17:37:39,637 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:39,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:39,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1424914980, now seen corresponding path program 2 times [2024-06-21 17:37:39,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:39,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841862568] [2024-06-21 17:37:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:39,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:40,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:40,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841862568] [2024-06-21 17:37:40,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841862568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:40,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:40,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:37:40,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714129490] [2024-06-21 17:37:40,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:40,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:37:40,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:37:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:37:40,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:37:40,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 659 transitions, 10226 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:40,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:40,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:37:40,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:42,582 INFO L124 PetriNetUnfolderBase]: 3744/5725 cut-off events. [2024-06-21 17:37:42,582 INFO L125 PetriNetUnfolderBase]: For 689298/689298 co-relation queries the response was YES. [2024-06-21 17:37:42,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52314 conditions, 5725 events. 3744/5725 cut-off events. For 689298/689298 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32686 event pairs, 623 based on Foata normal form. 1/5725 useless extension candidates. Maximal degree in co-relation 52106. Up to 5321 conditions per place. [2024-06-21 17:37:42,699 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 547 selfloop transitions, 126 changer transitions 0/677 dead transitions. [2024-06-21 17:37:42,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 677 transitions, 11636 flow [2024-06-21 17:37:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:37:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:37:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:37:42,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:37:42,700 INFO L175 Difference]: Start difference. First operand has 457 places, 659 transitions, 10226 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:37:42,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 677 transitions, 11636 flow [2024-06-21 17:37:48,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 677 transitions, 11294 flow, removed 83 selfloop flow, removed 9 redundant places. [2024-06-21 17:37:48,387 INFO L231 Difference]: Finished difference. Result has 457 places, 660 transitions, 10168 flow [2024-06-21 17:37:48,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9884, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10168, PETRI_PLACES=457, PETRI_TRANSITIONS=660} [2024-06-21 17:37:48,387 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-21 17:37:48,388 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 660 transitions, 10168 flow [2024-06-21 17:37:48,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:48,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:48,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:48,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 17:37:48,388 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:48,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1419262486, now seen corresponding path program 3 times [2024-06-21 17:37:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:48,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169090753] [2024-06-21 17:37:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:49,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:49,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169090753] [2024-06-21 17:37:49,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169090753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:49,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:49,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:37:49,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62618727] [2024-06-21 17:37:49,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:49,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:37:49,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:37:49,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:37:49,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:37:49,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 660 transitions, 10168 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:49,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:49,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:37:49,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:51,441 INFO L124 PetriNetUnfolderBase]: 3741/5715 cut-off events. [2024-06-21 17:37:51,441 INFO L125 PetriNetUnfolderBase]: For 656125/656125 co-relation queries the response was YES. [2024-06-21 17:37:51,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51361 conditions, 5715 events. 3741/5715 cut-off events. For 656125/656125 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 32573 event pairs, 631 based on Foata normal form. 1/5715 useless extension candidates. Maximal degree in co-relation 51155. Up to 5345 conditions per place. [2024-06-21 17:37:51,530 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 555 selfloop transitions, 115 changer transitions 0/674 dead transitions. [2024-06-21 17:37:51,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 674 transitions, 11551 flow [2024-06-21 17:37:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:37:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:37:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:37:51,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 17:37:51,531 INFO L175 Difference]: Start difference. First operand has 457 places, 660 transitions, 10168 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:37:51,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 674 transitions, 11551 flow [2024-06-21 17:37:56,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 674 transitions, 11153 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 17:37:56,934 INFO L231 Difference]: Finished difference. Result has 458 places, 660 transitions, 10025 flow [2024-06-21 17:37:56,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9770, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10025, PETRI_PLACES=458, PETRI_TRANSITIONS=660} [2024-06-21 17:37:56,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-21 17:37:56,934 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 660 transitions, 10025 flow [2024-06-21 17:37:56,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:56,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:56,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:56,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 17:37:56,934 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:56,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1419256751, now seen corresponding path program 2 times [2024-06-21 17:37:56,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:56,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058064203] [2024-06-21 17:37:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:56,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:57,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:57,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058064203] [2024-06-21 17:37:57,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058064203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:57,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:57,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:37:57,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400622921] [2024-06-21 17:37:57,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:57,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:37:57,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:37:57,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:37:58,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:37:58,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 660 transitions, 10025 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:58,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:58,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:37:58,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:59,912 INFO L124 PetriNetUnfolderBase]: 3767/5747 cut-off events. [2024-06-21 17:37:59,912 INFO L125 PetriNetUnfolderBase]: For 686401/686401 co-relation queries the response was YES. [2024-06-21 17:37:59,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52012 conditions, 5747 events. 3767/5747 cut-off events. For 686401/686401 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32683 event pairs, 548 based on Foata normal form. 2/5748 useless extension candidates. Maximal degree in co-relation 51805. Up to 5304 conditions per place. [2024-06-21 17:38:00,017 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 561 selfloop transitions, 126 changer transitions 0/691 dead transitions. [2024-06-21 17:38:00,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 691 transitions, 11939 flow [2024-06-21 17:38:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:38:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:38:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-21 17:38:00,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 17:38:00,018 INFO L175 Difference]: Start difference. First operand has 458 places, 660 transitions, 10025 flow. Second operand 12 states and 202 transitions. [2024-06-21 17:38:00,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 691 transitions, 11939 flow [2024-06-21 17:38:05,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 691 transitions, 11687 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 17:38:05,579 INFO L231 Difference]: Finished difference. Result has 462 places, 666 transitions, 10237 flow [2024-06-21 17:38:05,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9775, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10237, PETRI_PLACES=462, PETRI_TRANSITIONS=666} [2024-06-21 17:38:05,580 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-21 17:38:05,580 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 666 transitions, 10237 flow [2024-06-21 17:38:05,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:05,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:05,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:05,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 17:38:05,581 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:05,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:05,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1419262331, now seen corresponding path program 3 times [2024-06-21 17:38:05,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:05,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080229606] [2024-06-21 17:38:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:05,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:06,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080229606] [2024-06-21 17:38:06,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080229606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:06,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:06,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:38:06,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331998239] [2024-06-21 17:38:06,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:06,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:38:06,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:38:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:38:06,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:38:06,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 666 transitions, 10237 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:06,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:06,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:38:06,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:08,556 INFO L124 PetriNetUnfolderBase]: 3761/5743 cut-off events. [2024-06-21 17:38:08,557 INFO L125 PetriNetUnfolderBase]: For 675545/675545 co-relation queries the response was YES. [2024-06-21 17:38:08,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51898 conditions, 5743 events. 3761/5743 cut-off events. For 675545/675545 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32721 event pairs, 551 based on Foata normal form. 2/5744 useless extension candidates. Maximal degree in co-relation 51691. Up to 5299 conditions per place. [2024-06-21 17:38:08,662 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 562 selfloop transitions, 122 changer transitions 0/688 dead transitions. [2024-06-21 17:38:08,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 688 transitions, 11733 flow [2024-06-21 17:38:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:38:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:38:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:38:08,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 17:38:08,663 INFO L175 Difference]: Start difference. First operand has 462 places, 666 transitions, 10237 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:38:08,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 688 transitions, 11733 flow [2024-06-21 17:38:13,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 688 transitions, 11424 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-21 17:38:13,631 INFO L231 Difference]: Finished difference. Result has 463 places, 666 transitions, 10188 flow [2024-06-21 17:38:13,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9928, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10188, PETRI_PLACES=463, PETRI_TRANSITIONS=666} [2024-06-21 17:38:13,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 422 predicate places. [2024-06-21 17:38:13,632 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 666 transitions, 10188 flow [2024-06-21 17:38:13,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:13,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:13,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:13,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 17:38:13,633 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:13,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1128187947, now seen corresponding path program 4 times [2024-06-21 17:38:13,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:13,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362863171] [2024-06-21 17:38:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:13,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362863171] [2024-06-21 17:38:14,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362863171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:14,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:14,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:38:14,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562132135] [2024-06-21 17:38:14,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:14,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:38:14,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:14,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:38:14,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:38:14,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:38:14,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 666 transitions, 10188 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:14,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:14,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:38:14,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:16,287 INFO L124 PetriNetUnfolderBase]: 3771/5759 cut-off events. [2024-06-21 17:38:16,287 INFO L125 PetriNetUnfolderBase]: For 677383/677383 co-relation queries the response was YES. [2024-06-21 17:38:16,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52144 conditions, 5759 events. 3771/5759 cut-off events. For 677383/677383 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 32865 event pairs, 619 based on Foata normal form. 2/5760 useless extension candidates. Maximal degree in co-relation 51936. Up to 5489 conditions per place. [2024-06-21 17:38:16,387 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 628 selfloop transitions, 50 changer transitions 0/682 dead transitions. [2024-06-21 17:38:16,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 682 transitions, 11714 flow [2024-06-21 17:38:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:38:16,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:38:16,388 INFO L175 Difference]: Start difference. First operand has 463 places, 666 transitions, 10188 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:38:16,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 682 transitions, 11714 flow [2024-06-21 17:38:20,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 682 transitions, 11458 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 17:38:20,519 INFO L231 Difference]: Finished difference. Result has 461 places, 669 transitions, 10154 flow [2024-06-21 17:38:20,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9932, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10154, PETRI_PLACES=461, PETRI_TRANSITIONS=669} [2024-06-21 17:38:20,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 420 predicate places. [2024-06-21 17:38:20,519 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 669 transitions, 10154 flow [2024-06-21 17:38:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:20,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:20,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:20,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 17:38:20,520 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:20,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1135545177, now seen corresponding path program 5 times [2024-06-21 17:38:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:20,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181516067] [2024-06-21 17:38:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:21,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:21,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181516067] [2024-06-21 17:38:21,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181516067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:21,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:21,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:38:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081561390] [2024-06-21 17:38:21,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:38:21,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:38:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:38:21,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:38:21,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 669 transitions, 10154 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:21,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:21,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:38:21,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:23,292 INFO L124 PetriNetUnfolderBase]: 3797/5799 cut-off events. [2024-06-21 17:38:23,292 INFO L125 PetriNetUnfolderBase]: For 693429/693429 co-relation queries the response was YES. [2024-06-21 17:38:23,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52802 conditions, 5799 events. 3797/5799 cut-off events. For 693429/693429 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 33162 event pairs, 596 based on Foata normal form. 2/5800 useless extension candidates. Maximal degree in co-relation 52594. Up to 5256 conditions per place. [2024-06-21 17:38:23,393 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 549 selfloop transitions, 150 changer transitions 0/703 dead transitions. [2024-06-21 17:38:23,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 703 transitions, 12226 flow [2024-06-21 17:38:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:38:23,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:38:23,394 INFO L175 Difference]: Start difference. First operand has 461 places, 669 transitions, 10154 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:38:23,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 703 transitions, 12226 flow [2024-06-21 17:38:27,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 703 transitions, 12054 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:27,566 INFO L231 Difference]: Finished difference. Result has 464 places, 677 transitions, 10664 flow [2024-06-21 17:38:27,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9984, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10664, PETRI_PLACES=464, PETRI_TRANSITIONS=677} [2024-06-21 17:38:27,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 423 predicate places. [2024-06-21 17:38:27,567 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 677 transitions, 10664 flow [2024-06-21 17:38:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:27,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:27,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:27,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 17:38:27,567 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:27,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1135539597, now seen corresponding path program 6 times [2024-06-21 17:38:27,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:27,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038711439] [2024-06-21 17:38:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:27,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:28,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:28,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038711439] [2024-06-21 17:38:28,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038711439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:28,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:28,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:38:28,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257931776] [2024-06-21 17:38:28,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:28,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:38:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:38:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:38:28,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:38:28,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 677 transitions, 10664 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:28,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:28,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:38:28,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:30,492 INFO L124 PetriNetUnfolderBase]: 3791/5787 cut-off events. [2024-06-21 17:38:30,493 INFO L125 PetriNetUnfolderBase]: For 685403/685403 co-relation queries the response was YES. [2024-06-21 17:38:30,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53214 conditions, 5787 events. 3791/5787 cut-off events. For 685403/685403 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 33032 event pairs, 600 based on Foata normal form. 2/5788 useless extension candidates. Maximal degree in co-relation 53005. Up to 5251 conditions per place. [2024-06-21 17:38:30,756 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 557 selfloop transitions, 140 changer transitions 0/701 dead transitions. [2024-06-21 17:38:30,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 701 transitions, 12486 flow [2024-06-21 17:38:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:38:30,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 17:38:30,757 INFO L175 Difference]: Start difference. First operand has 464 places, 677 transitions, 10664 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:38:30,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 701 transitions, 12486 flow [2024-06-21 17:38:35,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 701 transitions, 12263 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:35,233 INFO L231 Difference]: Finished difference. Result has 467 places, 678 transitions, 10784 flow [2024-06-21 17:38:35,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10445, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10784, PETRI_PLACES=467, PETRI_TRANSITIONS=678} [2024-06-21 17:38:35,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-21 17:38:35,233 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 678 transitions, 10784 flow [2024-06-21 17:38:35,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:35,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:35,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:35,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 17:38:35,234 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:35,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1617940392, now seen corresponding path program 4 times [2024-06-21 17:38:35,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:35,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992771080] [2024-06-21 17:38:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:35,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:36,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:36,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992771080] [2024-06-21 17:38:36,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992771080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:36,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:36,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:38:36,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390747531] [2024-06-21 17:38:36,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:36,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:38:36,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:38:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:38:36,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:38:36,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 678 transitions, 10784 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:36,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:36,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:38:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:38,019 INFO L124 PetriNetUnfolderBase]: 3796/5796 cut-off events. [2024-06-21 17:38:38,019 INFO L125 PetriNetUnfolderBase]: For 679910/679910 co-relation queries the response was YES. [2024-06-21 17:38:38,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53512 conditions, 5796 events. 3796/5796 cut-off events. For 679910/679910 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33095 event pairs, 635 based on Foata normal form. 1/5796 useless extension candidates. Maximal degree in co-relation 53302. Up to 5059 conditions per place. [2024-06-21 17:38:38,111 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 470 selfloop transitions, 234 changer transitions 0/708 dead transitions. [2024-06-21 17:38:38,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 708 transitions, 12662 flow [2024-06-21 17:38:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:38:38,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 17:38:38,113 INFO L175 Difference]: Start difference. First operand has 467 places, 678 transitions, 10784 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:38:38,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 708 transitions, 12662 flow [2024-06-21 17:38:43,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 708 transitions, 12428 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:43,575 INFO L231 Difference]: Finished difference. Result has 470 places, 684 transitions, 11224 flow [2024-06-21 17:38:43,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10552, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11224, PETRI_PLACES=470, PETRI_TRANSITIONS=684} [2024-06-21 17:38:43,576 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-21 17:38:43,576 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 684 transitions, 11224 flow [2024-06-21 17:38:43,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:43,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:43,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:43,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 17:38:43,576 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:43,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1620920112, now seen corresponding path program 5 times [2024-06-21 17:38:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:43,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543388358] [2024-06-21 17:38:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:43,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:44,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:44,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543388358] [2024-06-21 17:38:44,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543388358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:44,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:44,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:38:44,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898480796] [2024-06-21 17:38:44,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:44,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:38:44,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:38:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:38:44,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:38:44,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 684 transitions, 11224 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:44,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:44,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:38:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:46,308 INFO L124 PetriNetUnfolderBase]: 3816/5835 cut-off events. [2024-06-21 17:38:46,308 INFO L125 PetriNetUnfolderBase]: For 684577/684579 co-relation queries the response was YES. [2024-06-21 17:38:46,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54233 conditions, 5835 events. 3816/5835 cut-off events. For 684577/684579 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 33479 event pairs, 655 based on Foata normal form. 3/5837 useless extension candidates. Maximal degree in co-relation 54023. Up to 5201 conditions per place. [2024-06-21 17:38:46,407 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 514 selfloop transitions, 201 changer transitions 0/719 dead transitions. [2024-06-21 17:38:46,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 719 transitions, 13150 flow [2024-06-21 17:38:46,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:38:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:38:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 17:38:46,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-21 17:38:46,408 INFO L175 Difference]: Start difference. First operand has 470 places, 684 transitions, 11224 flow. Second operand 11 states and 188 transitions. [2024-06-21 17:38:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 719 transitions, 13150 flow [2024-06-21 17:38:50,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 719 transitions, 12678 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:50,507 INFO L231 Difference]: Finished difference. Result has 476 places, 696 transitions, 11385 flow [2024-06-21 17:38:50,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10802, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11385, PETRI_PLACES=476, PETRI_TRANSITIONS=696} [2024-06-21 17:38:50,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 435 predicate places. [2024-06-21 17:38:50,508 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 696 transitions, 11385 flow [2024-06-21 17:38:50,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:50,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:50,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:50,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 17:38:50,508 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:50,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1736511548, now seen corresponding path program 1 times [2024-06-21 17:38:50,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:50,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63985273] [2024-06-21 17:38:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:50,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:51,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63985273] [2024-06-21 17:38:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63985273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:51,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723752313] [2024-06-21 17:38:51,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:51,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:51,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:51,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:51,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:38:51,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 696 transitions, 11385 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:51,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:51,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:38:51,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:53,246 INFO L124 PetriNetUnfolderBase]: 3860/5899 cut-off events. [2024-06-21 17:38:53,246 INFO L125 PetriNetUnfolderBase]: For 761669/761671 co-relation queries the response was YES. [2024-06-21 17:38:53,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55063 conditions, 5899 events. 3860/5899 cut-off events. For 761669/761671 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33839 event pairs, 572 based on Foata normal form. 14/5912 useless extension candidates. Maximal degree in co-relation 54851. Up to 5548 conditions per place. [2024-06-21 17:38:53,348 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 652 selfloop transitions, 64 changer transitions 0/720 dead transitions. [2024-06-21 17:38:53,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 720 transitions, 13012 flow [2024-06-21 17:38:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:38:53,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 17:38:53,349 INFO L175 Difference]: Start difference. First operand has 476 places, 696 transitions, 11385 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:38:53,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 720 transitions, 13012 flow [2024-06-21 17:38:58,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 720 transitions, 12649 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:58,756 INFO L231 Difference]: Finished difference. Result has 479 places, 697 transitions, 11187 flow [2024-06-21 17:38:58,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11022, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11187, PETRI_PLACES=479, PETRI_TRANSITIONS=697} [2024-06-21 17:38:58,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 438 predicate places. [2024-06-21 17:38:58,757 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 697 transitions, 11187 flow [2024-06-21 17:38:58,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:58,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:58,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:58,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 17:38:58,757 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:58,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash -736713728, now seen corresponding path program 1 times [2024-06-21 17:38:58,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:58,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289854122] [2024-06-21 17:38:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:59,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289854122] [2024-06-21 17:38:59,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289854122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:59,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:59,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:38:59,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297521420] [2024-06-21 17:38:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:59,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:38:59,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:38:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:38:59,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:38:59,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 697 transitions, 11187 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:59,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:59,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:38:59,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:01,596 INFO L124 PetriNetUnfolderBase]: 3870/5917 cut-off events. [2024-06-21 17:39:01,596 INFO L125 PetriNetUnfolderBase]: For 713869/713871 co-relation queries the response was YES. [2024-06-21 17:39:01,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55121 conditions, 5917 events. 3870/5917 cut-off events. For 713869/713871 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 34028 event pairs, 579 based on Foata normal form. 4/5920 useless extension candidates. Maximal degree in co-relation 54908. Up to 5603 conditions per place. [2024-06-21 17:39:01,700 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 643 selfloop transitions, 83 changer transitions 0/730 dead transitions. [2024-06-21 17:39:01,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 730 transitions, 12919 flow [2024-06-21 17:39:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:39:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:39:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-21 17:39:01,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41041666666666665 [2024-06-21 17:39:01,701 INFO L175 Difference]: Start difference. First operand has 479 places, 697 transitions, 11187 flow. Second operand 12 states and 197 transitions. [2024-06-21 17:39:01,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 730 transitions, 12919 flow [2024-06-21 17:39:07,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 730 transitions, 12824 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:07,128 INFO L231 Difference]: Finished difference. Result has 488 places, 708 transitions, 11534 flow [2024-06-21 17:39:07,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11092, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11534, PETRI_PLACES=488, PETRI_TRANSITIONS=708} [2024-06-21 17:39:07,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-21 17:39:07,128 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 708 transitions, 11534 flow [2024-06-21 17:39:07,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:07,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:07,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 17:39:07,129 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:07,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:07,129 INFO L85 PathProgramCache]: Analyzing trace with hash -736891730, now seen corresponding path program 6 times [2024-06-21 17:39:07,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:07,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428764324] [2024-06-21 17:39:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:08,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:08,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428764324] [2024-06-21 17:39:08,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428764324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:08,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:08,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:39:08,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039997050] [2024-06-21 17:39:08,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:08,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:39:08,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:08,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:39:08,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:39:08,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:39:08,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 708 transitions, 11534 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:08,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:08,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:39:08,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:10,129 INFO L124 PetriNetUnfolderBase]: 3890/5953 cut-off events. [2024-06-21 17:39:10,129 INFO L125 PetriNetUnfolderBase]: For 720890/720892 co-relation queries the response was YES. [2024-06-21 17:39:10,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55822 conditions, 5953 events. 3890/5953 cut-off events. For 720890/720892 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 34324 event pairs, 655 based on Foata normal form. 3/5955 useless extension candidates. Maximal degree in co-relation 55605. Up to 5609 conditions per place. [2024-06-21 17:39:10,227 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 633 selfloop transitions, 98 changer transitions 0/735 dead transitions. [2024-06-21 17:39:10,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 735 transitions, 13218 flow [2024-06-21 17:39:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:39:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:39:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 17:39:10,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-21 17:39:10,228 INFO L175 Difference]: Start difference. First operand has 488 places, 708 transitions, 11534 flow. Second operand 10 states and 164 transitions. [2024-06-21 17:39:10,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 735 transitions, 13218 flow [2024-06-21 17:39:15,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 735 transitions, 13106 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 17:39:15,478 INFO L231 Difference]: Finished difference. Result has 495 places, 720 transitions, 11817 flow [2024-06-21 17:39:15,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11422, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11817, PETRI_PLACES=495, PETRI_TRANSITIONS=720} [2024-06-21 17:39:15,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 454 predicate places. [2024-06-21 17:39:15,479 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 720 transitions, 11817 flow [2024-06-21 17:39:15,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:15,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:15,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:15,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 17:39:15,479 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:15,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:15,479 INFO L85 PathProgramCache]: Analyzing trace with hash -736891358, now seen corresponding path program 2 times [2024-06-21 17:39:15,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:15,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245561171] [2024-06-21 17:39:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:15,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:16,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:16,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245561171] [2024-06-21 17:39:16,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245561171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:16,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:16,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:39:16,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456971037] [2024-06-21 17:39:16,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:39:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:39:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:39:16,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:39:16,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 720 transitions, 11817 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:16,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:16,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:39:16,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:18,355 INFO L124 PetriNetUnfolderBase]: 3916/5983 cut-off events. [2024-06-21 17:39:18,355 INFO L125 PetriNetUnfolderBase]: For 752188/752190 co-relation queries the response was YES. [2024-06-21 17:39:18,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56618 conditions, 5983 events. 3916/5983 cut-off events. For 752188/752190 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 34442 event pairs, 580 based on Foata normal form. 4/5986 useless extension candidates. Maximal degree in co-relation 56399. Up to 5630 conditions per place. [2024-06-21 17:39:18,459 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 647 selfloop transitions, 97 changer transitions 0/748 dead transitions. [2024-06-21 17:39:18,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 748 transitions, 13774 flow [2024-06-21 17:39:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:39:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:39:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:39:18,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 17:39:18,460 INFO L175 Difference]: Start difference. First operand has 495 places, 720 transitions, 11817 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:39:18,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 748 transitions, 13774 flow [2024-06-21 17:39:24,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 748 transitions, 13562 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 17:39:24,732 INFO L231 Difference]: Finished difference. Result has 501 places, 727 transitions, 12006 flow [2024-06-21 17:39:24,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11606, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12006, PETRI_PLACES=501, PETRI_TRANSITIONS=727} [2024-06-21 17:39:24,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-21 17:39:24,733 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 727 transitions, 12006 flow [2024-06-21 17:39:24,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:24,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:24,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:24,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 17:39:24,733 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:24,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:24,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1736331624, now seen corresponding path program 3 times [2024-06-21 17:39:24,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:24,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665812276] [2024-06-21 17:39:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:24,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:25,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:25,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665812276] [2024-06-21 17:39:25,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665812276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:25,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:25,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:39:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61121899] [2024-06-21 17:39:25,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:25,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:39:25,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:39:25,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:39:25,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:39:25,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 727 transitions, 12006 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:25,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:25,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:39:25,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:27,626 INFO L124 PetriNetUnfolderBase]: 3920/5997 cut-off events. [2024-06-21 17:39:27,626 INFO L125 PetriNetUnfolderBase]: For 765008/765010 co-relation queries the response was YES. [2024-06-21 17:39:27,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56725 conditions, 5997 events. 3920/5997 cut-off events. For 765008/765010 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 34617 event pairs, 578 based on Foata normal form. 6/6002 useless extension candidates. Maximal degree in co-relation 56504. Up to 5602 conditions per place. [2024-06-21 17:39:27,729 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 652 selfloop transitions, 94 changer transitions 0/750 dead transitions. [2024-06-21 17:39:27,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 750 transitions, 13670 flow [2024-06-21 17:39:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:39:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:39:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:39:27,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:39:27,730 INFO L175 Difference]: Start difference. First operand has 501 places, 727 transitions, 12006 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:39:27,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 750 transitions, 13670 flow [2024-06-21 17:39:33,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 750 transitions, 13480 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 17:39:33,406 INFO L231 Difference]: Finished difference. Result has 504 places, 730 transitions, 12120 flow [2024-06-21 17:39:33,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11816, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12120, PETRI_PLACES=504, PETRI_TRANSITIONS=730} [2024-06-21 17:39:33,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-21 17:39:33,407 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 730 transitions, 12120 flow [2024-06-21 17:39:33,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:33,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:33,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:33,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 17:39:33,407 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:33,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2125257416, now seen corresponding path program 2 times [2024-06-21 17:39:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:33,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73764081] [2024-06-21 17:39:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:33,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:34,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:34,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73764081] [2024-06-21 17:39:34,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73764081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:34,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:34,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:39:34,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283892810] [2024-06-21 17:39:34,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:39:34,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:39:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:39:34,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:39:34,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 730 transitions, 12120 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:34,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:34,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:39:34,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:36,368 INFO L124 PetriNetUnfolderBase]: 3964/6066 cut-off events. [2024-06-21 17:39:36,368 INFO L125 PetriNetUnfolderBase]: For 834301/834301 co-relation queries the response was YES. [2024-06-21 17:39:36,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57976 conditions, 6066 events. 3964/6066 cut-off events. For 834301/834301 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 35165 event pairs, 647 based on Foata normal form. 12/6077 useless extension candidates. Maximal degree in co-relation 57754. Up to 5744 conditions per place. [2024-06-21 17:39:36,462 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 702 selfloop transitions, 41 changer transitions 0/747 dead transitions. [2024-06-21 17:39:36,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 747 transitions, 13780 flow [2024-06-21 17:39:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:39:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:39:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:39:36,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:39:36,463 INFO L175 Difference]: Start difference. First operand has 504 places, 730 transitions, 12120 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:39:36,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 747 transitions, 13780 flow [2024-06-21 17:39:42,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 747 transitions, 13450 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-21 17:39:42,452 INFO L231 Difference]: Finished difference. Result has 502 places, 731 transitions, 11913 flow [2024-06-21 17:39:42,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11790, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11913, PETRI_PLACES=502, PETRI_TRANSITIONS=731} [2024-06-21 17:39:42,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 461 predicate places. [2024-06-21 17:39:42,453 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 731 transitions, 11913 flow [2024-06-21 17:39:42,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:42,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:42,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:42,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 17:39:42,454 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:42,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1941808730, now seen corresponding path program 3 times [2024-06-21 17:39:42,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:42,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130083515] [2024-06-21 17:39:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:42,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:43,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:43,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130083515] [2024-06-21 17:39:43,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130083515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:43,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:43,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:39:43,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686603087] [2024-06-21 17:39:43,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:43,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:39:43,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:39:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:39:43,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:39:43,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 731 transitions, 11913 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:43,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:43,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:39:43,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:45,478 INFO L124 PetriNetUnfolderBase]: 4008/6130 cut-off events. [2024-06-21 17:39:45,478 INFO L125 PetriNetUnfolderBase]: For 847310/847310 co-relation queries the response was YES. [2024-06-21 17:39:45,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58355 conditions, 6130 events. 4008/6130 cut-off events. For 847310/847310 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 35505 event pairs, 577 based on Foata normal form. 12/6141 useless extension candidates. Maximal degree in co-relation 58133. Up to 5614 conditions per place. [2024-06-21 17:39:45,594 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 650 selfloop transitions, 99 changer transitions 0/753 dead transitions. [2024-06-21 17:39:45,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 753 transitions, 13605 flow [2024-06-21 17:39:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:39:45,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:39:45,595 INFO L175 Difference]: Start difference. First operand has 502 places, 731 transitions, 11913 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:39:45,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 753 transitions, 13605 flow [2024-06-21 17:39:52,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 753 transitions, 13536 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:39:52,483 INFO L231 Difference]: Finished difference. Result has 506 places, 732 transitions, 12094 flow [2024-06-21 17:39:52,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11844, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12094, PETRI_PLACES=506, PETRI_TRANSITIONS=732} [2024-06-21 17:39:52,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-21 17:39:52,484 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 732 transitions, 12094 flow [2024-06-21 17:39:52,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:52,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:52,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:52,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 17:39:52,484 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:52,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2116983206, now seen corresponding path program 4 times [2024-06-21 17:39:52,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:52,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952447455] [2024-06-21 17:39:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:52,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:53,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:53,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952447455] [2024-06-21 17:39:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952447455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:53,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:53,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:39:53,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122609901] [2024-06-21 17:39:53,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:53,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:39:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:53,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:39:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:39:53,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:39:53,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 732 transitions, 12094 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:53,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:53,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:39:53,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:55,313 INFO L124 PetriNetUnfolderBase]: 4044/6182 cut-off events. [2024-06-21 17:39:55,313 INFO L125 PetriNetUnfolderBase]: For 851264/851264 co-relation queries the response was YES. [2024-06-21 17:39:55,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59261 conditions, 6182 events. 4044/6182 cut-off events. For 851264/851264 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 35897 event pairs, 667 based on Foata normal form. 10/6191 useless extension candidates. Maximal degree in co-relation 59038. Up to 5795 conditions per place. [2024-06-21 17:39:55,429 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 685 selfloop transitions, 60 changer transitions 0/749 dead transitions. [2024-06-21 17:39:55,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 749 transitions, 13762 flow [2024-06-21 17:39:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:39:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:39:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:39:55,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:39:55,430 INFO L175 Difference]: Start difference. First operand has 506 places, 732 transitions, 12094 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:39:55,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 749 transitions, 13762 flow [2024-06-21 17:40:02,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 749 transitions, 13566 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:02,235 INFO L231 Difference]: Finished difference. Result has 507 places, 733 transitions, 12070 flow [2024-06-21 17:40:02,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11900, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12070, PETRI_PLACES=507, PETRI_TRANSITIONS=733} [2024-06-21 17:40:02,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 466 predicate places. [2024-06-21 17:40:02,236 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 733 transitions, 12070 flow [2024-06-21 17:40:02,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:02,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:02,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:02,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 17:40:02,236 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:02,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2125027024, now seen corresponding path program 1 times [2024-06-21 17:40:02,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:02,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902481929] [2024-06-21 17:40:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:02,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:03,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902481929] [2024-06-21 17:40:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902481929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:03,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:03,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:03,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465990796] [2024-06-21 17:40:03,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:03,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:03,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:40:03,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 733 transitions, 12070 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:03,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:03,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:40:03,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:05,068 INFO L124 PetriNetUnfolderBase]: 4051/6201 cut-off events. [2024-06-21 17:40:05,068 INFO L125 PetriNetUnfolderBase]: For 789853/789855 co-relation queries the response was YES. [2024-06-21 17:40:05,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59102 conditions, 6201 events. 4051/6201 cut-off events. For 789853/789855 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 36096 event pairs, 674 based on Foata normal form. 4/6204 useless extension candidates. Maximal degree in co-relation 58878. Up to 5929 conditions per place. [2024-06-21 17:40:05,189 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 698 selfloop transitions, 50 changer transitions 0/752 dead transitions. [2024-06-21 17:40:05,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 752 transitions, 13819 flow [2024-06-21 17:40:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:40:05,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 17:40:05,190 INFO L175 Difference]: Start difference. First operand has 507 places, 733 transitions, 12070 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:40:05,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 752 transitions, 13819 flow [2024-06-21 17:40:11,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 752 transitions, 13697 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 17:40:11,738 INFO L231 Difference]: Finished difference. Result has 510 places, 739 transitions, 12267 flow [2024-06-21 17:40:11,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11952, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12267, PETRI_PLACES=510, PETRI_TRANSITIONS=739} [2024-06-21 17:40:11,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 469 predicate places. [2024-06-21 17:40:11,739 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 739 transitions, 12267 flow [2024-06-21 17:40:11,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:11,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:11,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:11,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 17:40:11,740 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:11,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1941801786, now seen corresponding path program 4 times [2024-06-21 17:40:11,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:11,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978281071] [2024-06-21 17:40:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:11,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:12,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978281071] [2024-06-21 17:40:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978281071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:12,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:12,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:12,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163510991] [2024-06-21 17:40:12,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:12,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:12,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:12,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:12,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:40:12,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 739 transitions, 12267 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:12,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:12,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:40:12,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:14,839 INFO L124 PetriNetUnfolderBase]: 4071/6229 cut-off events. [2024-06-21 17:40:14,839 INFO L125 PetriNetUnfolderBase]: For 805032/805034 co-relation queries the response was YES. [2024-06-21 17:40:14,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59375 conditions, 6229 events. 4071/6229 cut-off events. For 805032/805034 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36287 event pairs, 660 based on Foata normal form. 6/6234 useless extension candidates. Maximal degree in co-relation 59149. Up to 5804 conditions per place. [2024-06-21 17:40:14,944 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 675 selfloop transitions, 87 changer transitions 0/766 dead transitions. [2024-06-21 17:40:14,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 766 transitions, 14105 flow [2024-06-21 17:40:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:40:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:40:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:40:14,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 17:40:14,945 INFO L175 Difference]: Start difference. First operand has 510 places, 739 transitions, 12267 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:40:14,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 766 transitions, 14105 flow [2024-06-21 17:40:21,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 766 transitions, 13968 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 17:40:21,329 INFO L231 Difference]: Finished difference. Result has 514 places, 745 transitions, 12508 flow [2024-06-21 17:40:21,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12130, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12508, PETRI_PLACES=514, PETRI_TRANSITIONS=745} [2024-06-21 17:40:21,330 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 473 predicate places. [2024-06-21 17:40:21,330 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 745 transitions, 12508 flow [2024-06-21 17:40:21,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:21,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:21,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:21,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 17:40:21,330 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:21,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2116686536, now seen corresponding path program 5 times [2024-06-21 17:40:21,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:21,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633879371] [2024-06-21 17:40:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:21,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:22,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:22,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633879371] [2024-06-21 17:40:22,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633879371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:22,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:22,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:22,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238310023] [2024-06-21 17:40:22,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:22,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:22,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:22,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:22,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:22,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:40:22,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 745 transitions, 12508 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:22,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:22,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:40:22,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:24,485 INFO L124 PetriNetUnfolderBase]: 4135/6326 cut-off events. [2024-06-21 17:40:24,485 INFO L125 PetriNetUnfolderBase]: For 864078/864078 co-relation queries the response was YES. [2024-06-21 17:40:24,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60799 conditions, 6326 events. 4135/6326 cut-off events. For 864078/864078 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 36918 event pairs, 664 based on Foata normal form. 12/6337 useless extension candidates. Maximal degree in co-relation 60573. Up to 5954 conditions per place. [2024-06-21 17:40:24,597 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 720 selfloop transitions, 43 changer transitions 0/767 dead transitions. [2024-06-21 17:40:24,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 767 transitions, 14315 flow [2024-06-21 17:40:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:40:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:40:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:40:24,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-21 17:40:24,598 INFO L175 Difference]: Start difference. First operand has 514 places, 745 transitions, 12508 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:40:24,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 767 transitions, 14315 flow [2024-06-21 17:40:30,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 767 transitions, 14033 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:30,828 INFO L231 Difference]: Finished difference. Result has 516 places, 748 transitions, 12390 flow [2024-06-21 17:40:30,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12226, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12390, PETRI_PLACES=516, PETRI_TRANSITIONS=748} [2024-06-21 17:40:30,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-21 17:40:30,828 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 748 transitions, 12390 flow [2024-06-21 17:40:30,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:30,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:30,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:30,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 17:40:30,829 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:30,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1941624156, now seen corresponding path program 5 times [2024-06-21 17:40:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114322711] [2024-06-21 17:40:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:31,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:31,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114322711] [2024-06-21 17:40:31,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114322711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:31,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:31,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:31,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109254434] [2024-06-21 17:40:31,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:31,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:31,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:31,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:31,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:40:31,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 748 transitions, 12390 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:31,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:31,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:40:31,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:33,928 INFO L124 PetriNetUnfolderBase]: 4187/6400 cut-off events. [2024-06-21 17:40:33,928 INFO L125 PetriNetUnfolderBase]: For 843647/843649 co-relation queries the response was YES. [2024-06-21 17:40:34,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62173 conditions, 6400 events. 4187/6400 cut-off events. For 843647/843649 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37394 event pairs, 677 based on Foata normal form. 6/6405 useless extension candidates. Maximal degree in co-relation 61945. Up to 5872 conditions per place. [2024-06-21 17:40:34,056 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 660 selfloop transitions, 131 changer transitions 0/795 dead transitions. [2024-06-21 17:40:34,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 795 transitions, 14831 flow [2024-06-21 17:40:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:40:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:40:34,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 17:40:34,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-21 17:40:34,057 INFO L175 Difference]: Start difference. First operand has 516 places, 748 transitions, 12390 flow. Second operand 10 states and 184 transitions. [2024-06-21 17:40:34,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 795 transitions, 14831 flow [2024-06-21 17:40:41,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 795 transitions, 14740 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:40:41,769 INFO L231 Difference]: Finished difference. Result has 523 places, 767 transitions, 13148 flow [2024-06-21 17:40:41,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12299, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13148, PETRI_PLACES=523, PETRI_TRANSITIONS=767} [2024-06-21 17:40:41,770 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 482 predicate places. [2024-06-21 17:40:41,770 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 767 transitions, 13148 flow [2024-06-21 17:40:41,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:41,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:41,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:41,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 17:40:41,770 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:41,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1941623784, now seen corresponding path program 7 times [2024-06-21 17:40:41,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:41,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290801249] [2024-06-21 17:40:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:41,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:42,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:42,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290801249] [2024-06-21 17:40:42,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290801249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:42,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:42,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:42,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059561640] [2024-06-21 17:40:42,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:42,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:42,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:42,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:42,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:40:42,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 767 transitions, 13148 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:42,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:42,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:40:42,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:44,753 INFO L124 PetriNetUnfolderBase]: 4184/6395 cut-off events. [2024-06-21 17:40:44,754 INFO L125 PetriNetUnfolderBase]: For 834106/834106 co-relation queries the response was YES. [2024-06-21 17:40:44,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62929 conditions, 6395 events. 4184/6395 cut-off events. For 834106/834106 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37379 event pairs, 711 based on Foata normal form. 1/6395 useless extension candidates. Maximal degree in co-relation 62699. Up to 5830 conditions per place. [2024-06-21 17:40:44,875 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 634 selfloop transitions, 151 changer transitions 0/789 dead transitions. [2024-06-21 17:40:44,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 789 transitions, 14774 flow [2024-06-21 17:40:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:40:44,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-21 17:40:44,876 INFO L175 Difference]: Start difference. First operand has 523 places, 767 transitions, 13148 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:40:44,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 789 transitions, 14774 flow [2024-06-21 17:40:52,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 789 transitions, 14410 flow, removed 124 selfloop flow, removed 7 redundant places. [2024-06-21 17:40:52,320 INFO L231 Difference]: Finished difference. Result has 524 places, 767 transitions, 13098 flow [2024-06-21 17:40:52,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12784, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13098, PETRI_PLACES=524, PETRI_TRANSITIONS=767} [2024-06-21 17:40:52,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 483 predicate places. [2024-06-21 17:40:52,321 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 767 transitions, 13098 flow [2024-06-21 17:40:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:52,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:52,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:52,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 17:40:52,322 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:52,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2125264360, now seen corresponding path program 6 times [2024-06-21 17:40:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740110394] [2024-06-21 17:40:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:52,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:53,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:53,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740110394] [2024-06-21 17:40:53,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740110394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:53,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:53,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:40:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726441898] [2024-06-21 17:40:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:53,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:40:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:40:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:40:53,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:40:53,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 767 transitions, 13098 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:53,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:53,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:40:53,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:55,321 INFO L124 PetriNetUnfolderBase]: 4182/6391 cut-off events. [2024-06-21 17:40:55,321 INFO L125 PetriNetUnfolderBase]: For 840810/840810 co-relation queries the response was YES. [2024-06-21 17:40:55,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62459 conditions, 6391 events. 4182/6391 cut-off events. For 840810/840810 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37357 event pairs, 696 based on Foata normal form. 6/6396 useless extension candidates. Maximal degree in co-relation 62228. Up to 6069 conditions per place. [2024-06-21 17:40:55,441 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 720 selfloop transitions, 60 changer transitions 0/784 dead transitions. [2024-06-21 17:40:55,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 784 transitions, 14846 flow [2024-06-21 17:40:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:40:55,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:40:55,442 INFO L175 Difference]: Start difference. First operand has 524 places, 767 transitions, 13098 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:40:55,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 784 transitions, 14846 flow [2024-06-21 17:41:02,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 784 transitions, 14518 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 17:41:02,323 INFO L231 Difference]: Finished difference. Result has 526 places, 770 transitions, 13018 flow [2024-06-21 17:41:02,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12770, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13018, PETRI_PLACES=526, PETRI_TRANSITIONS=770} [2024-06-21 17:41:02,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 485 predicate places. [2024-06-21 17:41:02,324 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 770 transitions, 13018 flow [2024-06-21 17:41:02,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:02,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:02,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:02,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 17:41:02,324 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:02,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1150765636, now seen corresponding path program 7 times [2024-06-21 17:41:02,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:02,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160428452] [2024-06-21 17:41:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:02,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:03,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:03,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160428452] [2024-06-21 17:41:03,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160428452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:03,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:03,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:41:03,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260806615] [2024-06-21 17:41:03,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:03,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:41:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:03,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:41:03,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:41:03,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:41:03,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 770 transitions, 13018 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:03,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:03,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:41:03,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:05,440 INFO L124 PetriNetUnfolderBase]: 4296/6564 cut-off events. [2024-06-21 17:41:05,441 INFO L125 PetriNetUnfolderBase]: For 873327/873329 co-relation queries the response was YES. [2024-06-21 17:41:05,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64603 conditions, 6564 events. 4296/6564 cut-off events. For 873327/873329 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 38498 event pairs, 712 based on Foata normal form. 6/6569 useless extension candidates. Maximal degree in co-relation 64371. Up to 5702 conditions per place. [2024-06-21 17:41:05,558 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 630 selfloop transitions, 215 changer transitions 0/849 dead transitions. [2024-06-21 17:41:05,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 849 transitions, 16001 flow [2024-06-21 17:41:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 17:41:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 17:41:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 241 transitions. [2024-06-21 17:41:05,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303571428571429 [2024-06-21 17:41:05,560 INFO L175 Difference]: Start difference. First operand has 526 places, 770 transitions, 13018 flow. Second operand 14 states and 241 transitions. [2024-06-21 17:41:05,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 849 transitions, 16001 flow [2024-06-21 17:41:12,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 849 transitions, 15756 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 17:41:12,628 INFO L231 Difference]: Finished difference. Result has 536 places, 804 transitions, 14070 flow [2024-06-21 17:41:12,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12773, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14070, PETRI_PLACES=536, PETRI_TRANSITIONS=804} [2024-06-21 17:41:12,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-21 17:41:12,629 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 804 transitions, 14070 flow [2024-06-21 17:41:12,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:12,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:12,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:12,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 17:41:12,629 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:12,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1269030946, now seen corresponding path program 8 times [2024-06-21 17:41:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:12,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153396914] [2024-06-21 17:41:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:12,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153396914] [2024-06-21 17:41:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153396914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:13,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:13,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:41:13,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017040977] [2024-06-21 17:41:13,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:13,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:41:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:41:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:41:13,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:41:13,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 804 transitions, 14070 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:13,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:13,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:41:13,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:15,991 INFO L124 PetriNetUnfolderBase]: 4316/6590 cut-off events. [2024-06-21 17:41:15,991 INFO L125 PetriNetUnfolderBase]: For 901360/901362 co-relation queries the response was YES. [2024-06-21 17:41:16,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66414 conditions, 6590 events. 4316/6590 cut-off events. For 901360/901362 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 38646 event pairs, 714 based on Foata normal form. 6/6595 useless extension candidates. Maximal degree in co-relation 66179. Up to 6196 conditions per place. [2024-06-21 17:41:16,332 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 758 selfloop transitions, 78 changer transitions 0/840 dead transitions. [2024-06-21 17:41:16,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 840 transitions, 16137 flow [2024-06-21 17:41:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:41:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:41:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 214 transitions. [2024-06-21 17:41:16,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115384615384615 [2024-06-21 17:41:16,333 INFO L175 Difference]: Start difference. First operand has 536 places, 804 transitions, 14070 flow. Second operand 13 states and 214 transitions. [2024-06-21 17:41:16,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 840 transitions, 16137 flow [2024-06-21 17:41:23,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 840 transitions, 15632 flow, removed 137 selfloop flow, removed 9 redundant places. [2024-06-21 17:41:23,682 INFO L231 Difference]: Finished difference. Result has 540 places, 808 transitions, 13888 flow [2024-06-21 17:41:23,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13619, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13888, PETRI_PLACES=540, PETRI_TRANSITIONS=808} [2024-06-21 17:41:23,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 499 predicate places. [2024-06-21 17:41:23,682 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 808 transitions, 13888 flow [2024-06-21 17:41:23,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:23,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:23,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:23,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 17:41:23,682 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:23,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1268853316, now seen corresponding path program 9 times [2024-06-21 17:41:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:23,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543412626] [2024-06-21 17:41:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:23,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:24,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:24,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543412626] [2024-06-21 17:41:24,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543412626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:24,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:24,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:41:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340730016] [2024-06-21 17:41:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:24,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:41:24,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:41:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:41:24,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:41:24,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 808 transitions, 13888 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:24,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:24,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:41:24,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:27,276 INFO L124 PetriNetUnfolderBase]: 4331/6611 cut-off events. [2024-06-21 17:41:27,277 INFO L125 PetriNetUnfolderBase]: For 891535/891537 co-relation queries the response was YES. [2024-06-21 17:41:27,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66243 conditions, 6611 events. 4331/6611 cut-off events. For 891535/891537 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 38782 event pairs, 731 based on Foata normal form. 4/6614 useless extension candidates. Maximal degree in co-relation 66006. Up to 6309 conditions per place. [2024-06-21 17:41:27,401 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 793 selfloop transitions, 62 changer transitions 0/859 dead transitions. [2024-06-21 17:41:27,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 859 transitions, 16120 flow [2024-06-21 17:41:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:41:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:41:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-21 17:41:27,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:41:27,402 INFO L175 Difference]: Start difference. First operand has 540 places, 808 transitions, 13888 flow. Second operand 13 states and 208 transitions. [2024-06-21 17:41:27,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 859 transitions, 16120 flow [2024-06-21 17:41:34,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 859 transitions, 15859 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-06-21 17:41:34,994 INFO L231 Difference]: Finished difference. Result has 548 places, 832 transitions, 14241 flow [2024-06-21 17:41:34,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13680, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14241, PETRI_PLACES=548, PETRI_TRANSITIONS=832} [2024-06-21 17:41:34,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 507 predicate places. [2024-06-21 17:41:34,995 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 832 transitions, 14241 flow [2024-06-21 17:41:34,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:34,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:34,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:34,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 17:41:34,995 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:34,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1151403452, now seen corresponding path program 6 times [2024-06-21 17:41:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:34,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088762311] [2024-06-21 17:41:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:35,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:35,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088762311] [2024-06-21 17:41:35,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088762311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:35,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:35,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:35,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211774474] [2024-06-21 17:41:35,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:35,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:35,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:35,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:35,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:41:35,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 832 transitions, 14241 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:35,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:35,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:41:35,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:38,209 INFO L124 PetriNetUnfolderBase]: 4375/6687 cut-off events. [2024-06-21 17:41:38,209 INFO L125 PetriNetUnfolderBase]: For 984060/984062 co-relation queries the response was YES. [2024-06-21 17:41:38,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67195 conditions, 6687 events. 4375/6687 cut-off events. For 984060/984062 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 39473 event pairs, 737 based on Foata normal form. 14/6700 useless extension candidates. Maximal degree in co-relation 66952. Up to 6296 conditions per place. [2024-06-21 17:41:38,343 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 788 selfloop transitions, 67 changer transitions 0/859 dead transitions. [2024-06-21 17:41:38,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 859 transitions, 16183 flow [2024-06-21 17:41:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:41:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:41:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:41:38,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 17:41:38,344 INFO L175 Difference]: Start difference. First operand has 548 places, 832 transitions, 14241 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:41:38,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 859 transitions, 16183 flow [2024-06-21 17:41:46,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 859 transitions, 15965 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-21 17:41:46,213 INFO L231 Difference]: Finished difference. Result has 554 places, 833 transitions, 14197 flow [2024-06-21 17:41:46,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14023, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14197, PETRI_PLACES=554, PETRI_TRANSITIONS=833} [2024-06-21 17:41:46,213 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 513 predicate places. [2024-06-21 17:41:46,213 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 833 transitions, 14197 flow [2024-06-21 17:41:46,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:46,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:46,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:46,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 17:41:46,214 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:46,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:46,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1120438690, now seen corresponding path program 10 times [2024-06-21 17:41:46,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:46,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304836172] [2024-06-21 17:41:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:46,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:47,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:47,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304836172] [2024-06-21 17:41:47,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304836172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:47,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:47,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:41:47,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809136653] [2024-06-21 17:41:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:47,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:41:47,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:41:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:41:47,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:41:47,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 833 transitions, 14197 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:47,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:47,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:41:47,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:49,561 INFO L124 PetriNetUnfolderBase]: 4483/6826 cut-off events. [2024-06-21 17:41:49,561 INFO L125 PetriNetUnfolderBase]: For 974891/974893 co-relation queries the response was YES. [2024-06-21 17:41:49,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69569 conditions, 6826 events. 4483/6826 cut-off events. For 974891/974893 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 40062 event pairs, 746 based on Foata normal form. 6/6831 useless extension candidates. Maximal degree in co-relation 69324. Up to 6175 conditions per place. [2024-06-21 17:41:49,710 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 712 selfloop transitions, 195 changer transitions 0/911 dead transitions. [2024-06-21 17:41:49,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 911 transitions, 17381 flow [2024-06-21 17:41:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:41:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:41:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 224 transitions. [2024-06-21 17:41:49,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2024-06-21 17:41:49,711 INFO L175 Difference]: Start difference. First operand has 554 places, 833 transitions, 14197 flow. Second operand 13 states and 224 transitions. [2024-06-21 17:41:49,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 911 transitions, 17381 flow [2024-06-21 17:41:55,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 911 transitions, 17208 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 17:41:55,727 INFO L231 Difference]: Finished difference. Result has 560 places, 866 transitions, 15315 flow [2024-06-21 17:41:55,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14024, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15315, PETRI_PLACES=560, PETRI_TRANSITIONS=866} [2024-06-21 17:41:55,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 519 predicate places. [2024-06-21 17:41:55,728 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 866 transitions, 15315 flow [2024-06-21 17:41:55,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:55,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:55,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:55,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 17:41:55,729 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:55,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash 482019908, now seen corresponding path program 11 times [2024-06-21 17:41:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:55,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903780986] [2024-06-21 17:41:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:56,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:56,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903780986] [2024-06-21 17:41:56,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903780986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:56,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:56,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:41:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709371815] [2024-06-21 17:41:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:56,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:41:56,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:41:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:41:56,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:41:56,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 866 transitions, 15315 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:56,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:56,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:41:56,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:59,552 INFO L124 PetriNetUnfolderBase]: 4514/6863 cut-off events. [2024-06-21 17:41:59,552 INFO L125 PetriNetUnfolderBase]: For 1002852/1002854 co-relation queries the response was YES. [2024-06-21 17:41:59,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71615 conditions, 6863 events. 4514/6863 cut-off events. For 1002852/1002854 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 40171 event pairs, 748 based on Foata normal form. 4/6866 useless extension candidates. Maximal degree in co-relation 71367. Up to 6353 conditions per place. [2024-06-21 17:41:59,686 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 756 selfloop transitions, 158 changer transitions 0/918 dead transitions. [2024-06-21 17:41:59,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 918 transitions, 18058 flow [2024-06-21 17:41:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:41:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:41:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 17:41:59,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-21 17:41:59,687 INFO L175 Difference]: Start difference. First operand has 560 places, 866 transitions, 15315 flow. Second operand 10 states and 174 transitions. [2024-06-21 17:41:59,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 918 transitions, 18058 flow [2024-06-21 17:42:07,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 918 transitions, 17469 flow, removed 194 selfloop flow, removed 8 redundant places. [2024-06-21 17:42:07,624 INFO L231 Difference]: Finished difference. Result has 563 places, 890 transitions, 15650 flow [2024-06-21 17:42:07,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14826, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15650, PETRI_PLACES=563, PETRI_TRANSITIONS=890} [2024-06-21 17:42:07,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 522 predicate places. [2024-06-21 17:42:07,624 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 890 transitions, 15650 flow [2024-06-21 17:42:07,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:07,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:07,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:07,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 17:42:07,625 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:07,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:07,625 INFO L85 PathProgramCache]: Analyzing trace with hash 836698658, now seen corresponding path program 12 times [2024-06-21 17:42:07,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:07,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238142366] [2024-06-21 17:42:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:07,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:08,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:08,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238142366] [2024-06-21 17:42:08,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238142366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:08,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:08,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:08,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351910839] [2024-06-21 17:42:08,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:08,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:08,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:08,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:08,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:08,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:42:08,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 890 transitions, 15650 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:08,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:08,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:42:08,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:11,009 INFO L124 PetriNetUnfolderBase]: 4564/6928 cut-off events. [2024-06-21 17:42:11,009 INFO L125 PetriNetUnfolderBase]: For 1061456/1061458 co-relation queries the response was YES. [2024-06-21 17:42:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73549 conditions, 6928 events. 4564/6928 cut-off events. For 1061456/1061458 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 40545 event pairs, 636 based on Foata normal form. 4/6931 useless extension candidates. Maximal degree in co-relation 73298. Up to 5823 conditions per place. [2024-06-21 17:42:11,147 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 701 selfloop transitions, 274 changer transitions 0/979 dead transitions. [2024-06-21 17:42:11,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 979 transitions, 19099 flow [2024-06-21 17:42:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:42:11,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-21 17:42:11,148 INFO L175 Difference]: Start difference. First operand has 563 places, 890 transitions, 15650 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:42:11,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 979 transitions, 19099 flow [2024-06-21 17:42:19,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 979 transitions, 18713 flow, removed 158 selfloop flow, removed 4 redundant places. [2024-06-21 17:42:19,522 INFO L231 Difference]: Finished difference. Result has 571 places, 933 transitions, 16864 flow [2024-06-21 17:42:19,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15322, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16864, PETRI_PLACES=571, PETRI_TRANSITIONS=933} [2024-06-21 17:42:19,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 530 predicate places. [2024-06-21 17:42:19,523 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 933 transitions, 16864 flow [2024-06-21 17:42:19,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:19,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:19,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:19,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 17:42:19,524 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:19,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash 836282948, now seen corresponding path program 13 times [2024-06-21 17:42:19,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:19,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549293835] [2024-06-21 17:42:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:20,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:20,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549293835] [2024-06-21 17:42:20,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549293835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:20,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:20,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:20,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032955614] [2024-06-21 17:42:20,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:20,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:20,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:20,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:20,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:42:20,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 933 transitions, 16864 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:20,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:20,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:42:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:23,133 INFO L124 PetriNetUnfolderBase]: 4572/6948 cut-off events. [2024-06-21 17:42:23,134 INFO L125 PetriNetUnfolderBase]: For 1080804/1080806 co-relation queries the response was YES. [2024-06-21 17:42:23,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74565 conditions, 6948 events. 4572/6948 cut-off events. For 1080804/1080806 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 40762 event pairs, 738 based on Foata normal form. 8/6955 useless extension candidates. Maximal degree in co-relation 74310. Up to 6245 conditions per place. [2024-06-21 17:42:23,283 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 675 selfloop transitions, 285 changer transitions 0/964 dead transitions. [2024-06-21 17:42:23,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 964 transitions, 18973 flow [2024-06-21 17:42:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:42:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:42:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-21 17:42:23,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 17:42:23,284 INFO L175 Difference]: Start difference. First operand has 571 places, 933 transitions, 16864 flow. Second operand 12 states and 205 transitions. [2024-06-21 17:42:23,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 964 transitions, 18973 flow [2024-06-21 17:42:33,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 964 transitions, 18690 flow, removed 119 selfloop flow, removed 6 redundant places. [2024-06-21 17:42:33,524 INFO L231 Difference]: Finished difference. Result has 577 places, 939 transitions, 17295 flow [2024-06-21 17:42:33,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16581, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17295, PETRI_PLACES=577, PETRI_TRANSITIONS=939} [2024-06-21 17:42:33,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 536 predicate places. [2024-06-21 17:42:33,525 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 939 transitions, 17295 flow [2024-06-21 17:42:33,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:33,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:33,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 17:42:33,525 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:33,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 177644894, now seen corresponding path program 7 times [2024-06-21 17:42:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:33,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675756977] [2024-06-21 17:42:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:34,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675756977] [2024-06-21 17:42:34,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675756977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:34,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:34,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566118603] [2024-06-21 17:42:34,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:34,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:34,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:42:34,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 939 transitions, 17295 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:34,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:34,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:42:34,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:37,301 INFO L124 PetriNetUnfolderBase]: 4621/7026 cut-off events. [2024-06-21 17:42:37,301 INFO L125 PetriNetUnfolderBase]: For 1089008/1089008 co-relation queries the response was YES. [2024-06-21 17:42:37,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74678 conditions, 7026 events. 4621/7026 cut-off events. For 1089008/1089008 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 41288 event pairs, 614 based on Foata normal form. 12/7037 useless extension candidates. Maximal degree in co-relation 74424. Up to 6418 conditions per place. [2024-06-21 17:42:37,464 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 821 selfloop transitions, 146 changer transitions 0/971 dead transitions. [2024-06-21 17:42:37,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 971 transitions, 19544 flow [2024-06-21 17:42:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:42:37,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:42:37,466 INFO L175 Difference]: Start difference. First operand has 577 places, 939 transitions, 17295 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:42:37,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 971 transitions, 19544 flow [2024-06-21 17:42:46,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 971 transitions, 18901 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-21 17:42:47,142 INFO L231 Difference]: Finished difference. Result has 579 places, 946 transitions, 17149 flow [2024-06-21 17:42:47,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16652, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17149, PETRI_PLACES=579, PETRI_TRANSITIONS=946} [2024-06-21 17:42:47,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 538 predicate places. [2024-06-21 17:42:47,143 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 946 transitions, 17149 flow [2024-06-21 17:42:47,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:47,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:47,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:47,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 17:42:47,143 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:47,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash 340890, now seen corresponding path program 14 times [2024-06-21 17:42:47,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:47,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767314994] [2024-06-21 17:42:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:47,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:48,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:48,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767314994] [2024-06-21 17:42:48,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767314994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:48,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:48,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:48,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021256150] [2024-06-21 17:42:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:48,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:42:48,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 946 transitions, 17149 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:48,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:48,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:42:48,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:51,132 INFO L124 PetriNetUnfolderBase]: 4801/7281 cut-off events. [2024-06-21 17:42:51,132 INFO L125 PetriNetUnfolderBase]: For 1218274/1218276 co-relation queries the response was YES. [2024-06-21 17:42:51,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81102 conditions, 7281 events. 4801/7281 cut-off events. For 1218274/1218276 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 42892 event pairs, 631 based on Foata normal form. 6/7286 useless extension candidates. Maximal degree in co-relation 80845. Up to 6308 conditions per place. [2024-06-21 17:42:51,267 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 741 selfloop transitions, 270 changer transitions 0/1015 dead transitions. [2024-06-21 17:42:51,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1015 transitions, 21165 flow [2024-06-21 17:42:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:42:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:42:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 211 transitions. [2024-06-21 17:42:51,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2024-06-21 17:42:51,268 INFO L175 Difference]: Start difference. First operand has 579 places, 946 transitions, 17149 flow. Second operand 12 states and 211 transitions. [2024-06-21 17:42:51,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1015 transitions, 21165 flow [2024-06-21 17:43:01,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 1015 transitions, 20968 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:01,194 INFO L231 Difference]: Finished difference. Result has 588 places, 982 transitions, 18852 flow [2024-06-21 17:43:01,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16952, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18852, PETRI_PLACES=588, PETRI_TRANSITIONS=982} [2024-06-21 17:43:01,195 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 547 predicate places. [2024-06-21 17:43:01,195 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 982 transitions, 18852 flow [2024-06-21 17:43:01,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:01,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:01,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 17:43:01,195 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:01,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1645573564, now seen corresponding path program 15 times [2024-06-21 17:43:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997553748] [2024-06-21 17:43:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:01,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:02,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:02,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997553748] [2024-06-21 17:43:02,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997553748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:02,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:02,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:43:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286229194] [2024-06-21 17:43:02,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:02,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:43:02,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:02,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:43:02,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:43:02,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:43:02,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 982 transitions, 18852 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:02,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:02,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:43:02,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:05,417 INFO L124 PetriNetUnfolderBase]: 4809/7293 cut-off events. [2024-06-21 17:43:05,418 INFO L125 PetriNetUnfolderBase]: For 1231916/1231918 co-relation queries the response was YES. [2024-06-21 17:43:05,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82057 conditions, 7293 events. 4809/7293 cut-off events. For 1231916/1231918 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42971 event pairs, 768 based on Foata normal form. 8/7300 useless extension candidates. Maximal degree in co-relation 81796. Up to 6897 conditions per place. [2024-06-21 17:43:05,574 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 881 selfloop transitions, 122 changer transitions 0/1007 dead transitions. [2024-06-21 17:43:05,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1007 transitions, 21080 flow [2024-06-21 17:43:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:43:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:43:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-21 17:43:05,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-21 17:43:05,586 INFO L175 Difference]: Start difference. First operand has 588 places, 982 transitions, 18852 flow. Second operand 11 states and 182 transitions. [2024-06-21 17:43:05,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1007 transitions, 21080 flow [2024-06-21 17:43:15,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 1007 transitions, 20450 flow, removed 174 selfloop flow, removed 9 redundant places. [2024-06-21 17:43:15,420 INFO L231 Difference]: Finished difference. Result has 590 places, 989 transitions, 18659 flow [2024-06-21 17:43:15,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18237, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18659, PETRI_PLACES=590, PETRI_TRANSITIONS=989} [2024-06-21 17:43:15,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 549 predicate places. [2024-06-21 17:43:15,421 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 989 transitions, 18659 flow [2024-06-21 17:43:15,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:15,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:15,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:15,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 17:43:15,421 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:15,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1467782240, now seen corresponding path program 8 times [2024-06-21 17:43:15,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:15,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945919197] [2024-06-21 17:43:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:16,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:16,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945919197] [2024-06-21 17:43:16,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945919197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:16,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:16,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:43:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281553498] [2024-06-21 17:43:16,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:43:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:43:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:43:16,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:43:16,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 989 transitions, 18659 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:16,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:16,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:43:16,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:19,431 INFO L124 PetriNetUnfolderBase]: 4909/7453 cut-off events. [2024-06-21 17:43:19,431 INFO L125 PetriNetUnfolderBase]: For 1358777/1358779 co-relation queries the response was YES. [2024-06-21 17:43:19,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85046 conditions, 7453 events. 4909/7453 cut-off events. For 1358777/1358779 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 44156 event pairs, 662 based on Foata normal form. 10/7462 useless extension candidates. Maximal degree in co-relation 84783. Up to 6701 conditions per place. [2024-06-21 17:43:19,591 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 900 selfloop transitions, 116 changer transitions 0/1020 dead transitions. [2024-06-21 17:43:19,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1020 transitions, 21360 flow [2024-06-21 17:43:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:43:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:43:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:43:19,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 17:43:19,593 INFO L175 Difference]: Start difference. First operand has 590 places, 989 transitions, 18659 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:43:19,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1020 transitions, 21360 flow [2024-06-21 17:43:30,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 1020 transitions, 20955 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-21 17:43:30,479 INFO L231 Difference]: Finished difference. Result has 590 places, 991 transitions, 18564 flow [2024-06-21 17:43:30,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18254, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=989, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18564, PETRI_PLACES=590, PETRI_TRANSITIONS=991} [2024-06-21 17:43:30,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 549 predicate places. [2024-06-21 17:43:30,480 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 991 transitions, 18564 flow [2024-06-21 17:43:30,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:30,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:30,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:30,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 17:43:30,480 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:30,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1474455424, now seen corresponding path program 16 times [2024-06-21 17:43:30,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:30,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172689046] [2024-06-21 17:43:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:30,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:31,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172689046] [2024-06-21 17:43:31,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172689046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:31,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:31,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:43:31,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196355204] [2024-06-21 17:43:31,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:31,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:43:31,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:43:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:43:31,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:43:31,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 991 transitions, 18564 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:31,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:31,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:43:31,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:34,405 INFO L124 PetriNetUnfolderBase]: 4919/7459 cut-off events. [2024-06-21 17:43:34,405 INFO L125 PetriNetUnfolderBase]: For 1332304/1332306 co-relation queries the response was YES. [2024-06-21 17:43:34,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85336 conditions, 7459 events. 4919/7459 cut-off events. For 1332304/1332306 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 44071 event pairs, 679 based on Foata normal form. 4/7462 useless extension candidates. Maximal degree in co-relation 85072. Up to 6934 conditions per place. [2024-06-21 17:43:34,550 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 878 selfloop transitions, 151 changer transitions 0/1033 dead transitions. [2024-06-21 17:43:34,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 1033 transitions, 21324 flow [2024-06-21 17:43:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:43:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:43:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-21 17:43:34,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41458333333333336 [2024-06-21 17:43:34,551 INFO L175 Difference]: Start difference. First operand has 590 places, 991 transitions, 18564 flow. Second operand 12 states and 199 transitions. [2024-06-21 17:43:34,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 1033 transitions, 21324 flow [2024-06-21 17:43:45,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1033 transitions, 21169 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:45,287 INFO L231 Difference]: Finished difference. Result has 600 places, 1009 transitions, 19163 flow [2024-06-21 17:43:45,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18409, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19163, PETRI_PLACES=600, PETRI_TRANSITIONS=1009} [2024-06-21 17:43:45,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 559 predicate places. [2024-06-21 17:43:45,288 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 1009 transitions, 19163 flow [2024-06-21 17:43:45,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:45,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:45,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:45,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 17:43:45,288 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:45,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1474722334, now seen corresponding path program 17 times [2024-06-21 17:43:45,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:45,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863529285] [2024-06-21 17:43:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:45,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:46,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:46,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863529285] [2024-06-21 17:43:46,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863529285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:46,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:46,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:43:46,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690790057] [2024-06-21 17:43:46,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:46,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:43:46,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:46,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:43:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:43:46,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:43:46,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1009 transitions, 19163 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:46,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:46,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:43:46,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:49,470 INFO L124 PetriNetUnfolderBase]: 4939/7489 cut-off events. [2024-06-21 17:43:49,470 INFO L125 PetriNetUnfolderBase]: For 1370496/1370498 co-relation queries the response was YES. [2024-06-21 17:43:49,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86570 conditions, 7489 events. 4939/7489 cut-off events. For 1370496/1370498 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 44279 event pairs, 660 based on Foata normal form. 6/7494 useless extension candidates. Maximal degree in co-relation 86301. Up to 6765 conditions per place. [2024-06-21 17:43:49,614 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 832 selfloop transitions, 203 changer transitions 0/1039 dead transitions. [2024-06-21 17:43:49,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1039 transitions, 21602 flow [2024-06-21 17:43:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:43:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:43:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-21 17:43:49,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:43:49,615 INFO L175 Difference]: Start difference. First operand has 600 places, 1009 transitions, 19163 flow. Second operand 12 states and 204 transitions. [2024-06-21 17:43:49,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1039 transitions, 21602 flow [2024-06-21 17:43:59,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1039 transitions, 21337 flow, removed 121 selfloop flow, removed 2 redundant places. [2024-06-21 17:43:59,919 INFO L231 Difference]: Finished difference. Result has 610 places, 1015 transitions, 19567 flow [2024-06-21 17:43:59,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18946, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19567, PETRI_PLACES=610, PETRI_TRANSITIONS=1015} [2024-06-21 17:43:59,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 569 predicate places. [2024-06-21 17:43:59,920 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 1015 transitions, 19567 flow [2024-06-21 17:43:59,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:59,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:59,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:59,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 17:43:59,921 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:59,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:59,921 INFO L85 PathProgramCache]: Analyzing trace with hash -235661986, now seen corresponding path program 9 times [2024-06-21 17:43:59,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:59,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628207134] [2024-06-21 17:43:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:59,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:00,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:00,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628207134] [2024-06-21 17:44:00,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628207134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:00,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:00,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:44:00,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50556028] [2024-06-21 17:44:00,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:00,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:44:00,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:00,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:44:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:44:00,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:44:00,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1015 transitions, 19567 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:00,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:00,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:44:00,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:03,988 INFO L124 PetriNetUnfolderBase]: 4911/7452 cut-off events. [2024-06-21 17:44:03,988 INFO L125 PetriNetUnfolderBase]: For 1348902/1348902 co-relation queries the response was YES. [2024-06-21 17:44:04,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84747 conditions, 7452 events. 4911/7452 cut-off events. For 1348902/1348902 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 44095 event pairs, 778 based on Foata normal form. 12/7463 useless extension candidates. Maximal degree in co-relation 84476. Up to 7035 conditions per place. [2024-06-21 17:44:04,148 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 950 selfloop transitions, 82 changer transitions 0/1036 dead transitions. [2024-06-21 17:44:04,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1036 transitions, 21831 flow [2024-06-21 17:44:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:44:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:44:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:44:04,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 17:44:04,149 INFO L175 Difference]: Start difference. First operand has 610 places, 1015 transitions, 19567 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:44:04,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1036 transitions, 21831 flow [2024-06-21 17:44:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1036 transitions, 21267 flow, removed 83 selfloop flow, removed 10 redundant places. [2024-06-21 17:44:14,234 INFO L231 Difference]: Finished difference. Result has 609 places, 1015 transitions, 19173 flow [2024-06-21 17:44:14,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19003, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19173, PETRI_PLACES=609, PETRI_TRANSITIONS=1015} [2024-06-21 17:44:14,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 568 predicate places. [2024-06-21 17:44:14,234 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1015 transitions, 19173 flow [2024-06-21 17:44:14,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:14,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:14,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:14,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 17:44:14,235 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:44:14,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:14,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1482073984, now seen corresponding path program 18 times [2024-06-21 17:44:14,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:14,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467375252] [2024-06-21 17:44:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:14,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:15,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467375252] [2024-06-21 17:44:15,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467375252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:15,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:15,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:44:15,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354469981] [2024-06-21 17:44:15,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:15,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:44:15,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:15,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:44:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:44:15,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:44:15,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1015 transitions, 19173 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:15,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:15,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:44:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:18,305 INFO L124 PetriNetUnfolderBase]: 4915/7465 cut-off events. [2024-06-21 17:44:18,305 INFO L125 PetriNetUnfolderBase]: For 1276266/1276268 co-relation queries the response was YES. [2024-06-21 17:44:18,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84024 conditions, 7465 events. 4915/7465 cut-off events. For 1276266/1276268 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 44278 event pairs, 642 based on Foata normal form. 6/7470 useless extension candidates. Maximal degree in co-relation 83752. Up to 6731 conditions per place. [2024-06-21 17:44:18,462 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 837 selfloop transitions, 205 changer transitions 0/1046 dead transitions. [2024-06-21 17:44:18,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1046 transitions, 21544 flow [2024-06-21 17:44:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:44:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:44:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-21 17:44:18,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2024-06-21 17:44:18,463 INFO L175 Difference]: Start difference. First operand has 609 places, 1015 transitions, 19173 flow. Second operand 13 states and 218 transitions. [2024-06-21 17:44:18,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1046 transitions, 21544 flow [2024-06-21 17:44:29,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 1046 transitions, 21357 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:44:29,550 INFO L231 Difference]: Finished difference. Result has 614 places, 1018 transitions, 19523 flow [2024-06-21 17:44:29,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18986, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19523, PETRI_PLACES=614, PETRI_TRANSITIONS=1018} [2024-06-21 17:44:29,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 573 predicate places. [2024-06-21 17:44:29,550 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1018 transitions, 19523 flow [2024-06-21 17:44:29,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:29,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:29,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:29,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 17:44:29,551 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:44:29,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash -235668930, now seen corresponding path program 19 times [2024-06-21 17:44:29,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:29,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332506868] [2024-06-21 17:44:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:30,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:30,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332506868] [2024-06-21 17:44:30,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332506868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:30,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:30,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:44:30,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496931818] [2024-06-21 17:44:30,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:30,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:44:30,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:30,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:44:30,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:44:30,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:44:30,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1018 transitions, 19523 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:30,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:30,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:44:30,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15